2025 100-150 dumps review - Professional Quiz Study Materials
100-150 Test Prep Training Practice Exam Questions Practice Tests
NEW QUESTION # 25
During the data encapsulation process, which OSI layer adds a header that contains MAC addressing information and a trailer used for error checking?
- A. Network
- B. Transport
- C. Session
- D. Data Link
Answer: D
NEW QUESTION # 26
A support technician examines the front panel of a Cisco switch and sees 4 Ethernet cables connected in the first four ports. Ports 1, 2, and 3 have a green LED. Port 4 has a blinking green light.
What is the state of the Port 4?
- A. Link is up and not stable.
- B. Link is up with cable malfunctions.
- C. Link is up and there is no activity.
- D. Link is up and active.
Answer: D
Explanation:
On a Cisco switch, a port with a blinking green LED typically indicates that the port is up (active) and is currently transmitting or receiving data.
This is a normal state indicating active traffic on the port.
* A. Link is up with cable malfunctions: Usually indicated by an amber or blinking amber light.
* B. Link is up and not stable: Not typically indicated by a green blinking light.
* D. Link is up and there is no activity: Would be indicated by a solid green light without blinking.
Thus, the correct answer is C. Link is up and active.
Reference: =
* Cisco Switch LED Indicators
* Cisco Ethernet Switch LED Patterns
NEW QUESTION # 27
A host is given the IP address 172.16.100.25 and the subnet mask 255.255.252.0.
What is the CIDR notation for this address?
- A. 172.16.100.25 /22
- B. 172.16.100.25 /20
- C. 172.16.100.25 /23
- D. 172.16.100.25 /21
Answer: A
Explanation:
The CIDR (Classless Inter-Domain Routing) notation for the subnet mask 255.255.252.0 is /22. This notation indicates that the first 22 bits of the IP address are used for network identification, and the remaining bits are used for host addresses within the network1.
Reference: =
* Subnet Cheat Sheet - 24 Subnet Mask, 30, 26, 27, 29, and other IP Address CIDR Network Reference
* Subnet Mask to CIDR Notation: The given subnet mask is 255.255.252.0.
To convert this to CIDR notation:
* Convert the subnet mask to binary: 11111111.11111111.11111100.00000000
* Count the number of consecutive 1s in the binary form: There are 22 ones.
* Therefore, the CIDR notation is /22.
Reference: * Understanding Subnetting and CIDR: Cisco CIDR Guide
NEW QUESTION # 28
A Cisco PoE switch is shown in the following image.
Which type of port will provide both data connectivity and power to an IP phone?
- A. Ports identified with number 6
- B. Port identified with number 2
- C. Ports identified with number 7
- D. Ports identified with numbers 3 and 4
Answer: A
Explanation:
In the provided image of the Cisco PoE switch, the ports identified with number 6 are the standard RJ-45 Ethernet ports typically found on switches that provide both data connectivity and Power over Ethernet (PoE). PoE ports are designed to supply power to devices such as IP phones, wireless access points, and other PoE-enabled devices directly through the Ethernet cable.
Ports:
* 2: Console port (for management and configuration)
* 3 and 4: Specific function ports (often for management)
* 6: RJ-45 Ethernet ports (capable of providing PoE)
* 7: SFP ports (for fiber connections, typically do not provide PoE) Thus, the correct answer is C. Ports identified with number 6.
Reference: =
* Cisco Catalyst 2960-L Series Switches Data Sheet
* Cisco PoE Overview
NEW QUESTION # 29
An engineer configured a new VLAN named VLAN2 for the Data Center team. When the team tries to ping addresses outside VLAN2 from a computer in VLAN2, they are unable to reach them.
What should the engineer configure?
- A. Additional VLAN
- B. Static route
- C. Default route
- D. Default gateway
Answer: D
Explanation:
When devices within a VLAN are unable to reach addresses outside their VLAN, it typically indicates that they do not have a configured path to external networks. The engineer should configure a default gateway for VLAN2. The default gateway is the IP address of the router's interface that is connected to the VLAN, which will route traffic from the VLAN to other networks12.
References :=
*Understanding and Configuring VLAN Routing and Bridging on a Router Using the IRB Feature
*VLAN 2 not able to ping gateway - Cisco Community
*VLANs: Virtual Local Area Networks (VLANs) logically segment network traffic to improve security and performance. Devices within the same VLAN can communicate directly.
*Default Gateway: For devices in VLAN2 to communicate with devices outside their VLAN, they need a default gateway configured. The default gateway is typically a router or Layer 3 switch that routes traffic between different VLANs and subnets.
*Additional VLAN: Not needed in this scenario as the issue is related to routing traffic outside VLAN2, not creating another VLAN.
*Default Route: While a default route on the router may be necessary, the primary issue for devices within VLAN2 is to have a configured default gateway.
*Static Route: This is used on routers to manually specify routes to specific networks but does not address the need for a default gateway on the client devices.
References:
*Cisco VLAN Configuration Guide: Cisco VLAN Configuration
*Understanding and Configuring VLANs: VLANs Guide
NEW QUESTION # 30
A user initiates a trouble ticket stating that an external web page is not loading. You determine that other resources both internal and external are still reachable.
Which command can you use to help locate where the issue is in the network path to the external web page?
- A. ping -t
- B. ipconfig/all
- C. tracert
- D. nslookup
Answer: C
Explanation:
The tracert command is used to determine the route taken by packets across an IP network. When a user reports that an external web page is not loading, while other resources are accessible, it suggests there might be an issue at a certain point in the network path to the specific web page. The tracert command helps to diagnose where the breakdown occurs by displaying a list of routers that the packets pass through on their way to the destination. It can identify the network segment where the packets stop progressing, which is valuable for pinpointing where the connectivity issue lies. References := Cisco CCST Networking Certification FAQs - CISCONET Training Solutions, Command Prompt (CMD): 10 network-related commands you should know, Network Troubleshooting Commands Guide: Windows, Mac & Linux - Comparitech, How to Use the Traceroute and Ping Commands to Troubleshoot Network, Network Troubleshooting Techniques: Ping, Traceroute, PathPing.
*tracert Command: This command is used to determine the path packets take to reach a destination. It lists all the hops (routers) along the way and can help identify where the delay or failure occurs.
*ping -t: This command sends continuous ping requests and is useful for determining if a host is reachable but does not provide path information.
*ipconfig /all: This command displays all current TCP/IP network configuration values and can be used to verify network settings but not to trace a network path.
*nslookup: This command queries the DNS to obtain domain name or IP address mapping, useful for DNS issues but not for tracing network paths.
References:
*Microsoft tracert Command: tracert Command Guide
*Troubleshooting Network Issues with tracert: Network Troubleshooting Guide
NEW QUESTION # 31
Examine the following output:
Which two conclusions can you make from the output of the tracert command? (Choose 2.) Note: You will receive partial credit for each correct answer.
- A. The routers at hops 5 and 6 are offline.
- B. The trace failed after the fourth hop.
- C. The device sending the trace has IPv6 address 2600:1408:c400:38d :: b33.
- D. The IPv6 address associated with the www.cisco.com server is 2600:1408: c400: 38d: : b33.
- E. The trace successfully reached the www.cisco.com server.
Answer: D,E
Explanation:
*Statement A: "The trace successfully reached the www.cisco.com server." This is true as indicated by the
"Trace complete" message at the end, showing that the trace has reached its destination.
*Statement C: "The IPv6 address associated with the www.cisco.com server is 2600:1408:c400:38d::b33." This is true because the final hop in the trace, which is the destination, has this IPv6 address.
*Statement B: "The trace failed after the fourth hop." This is incorrect as the trace continues beyond the fourth hop, despite some intermediate timeouts.
*Statement D: "The routers at hops 5 and 6 are offline." This is not necessarily true. The routers might be configured to not respond to traceroute requests.
*Statement E: "The device sending the trace has IPv6 address 2600:1408:c400:38d::b33." This is incorrect; this address belongs to the destination server, not the sender.
References:
*Understanding Traceroute: Traceroute Guide
NEW QUESTION # 32
Which standard contains the specifications for Wi-Fi networks?
- A. EIA/TIA 568A
- B. IEEE 802.11
- C. GSM
- D. LTE
- E. IEEE 802.3
Answer: B
Explanation:
The IEEE 802.11 standard contains the specifications for Wi-Fi networks. It is a set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in various frequencies, including but not limited to 2.4 GHz, 5 GHz, and 6 GHz1.
This standard is maintained by the Institute of Electrical and Electronics Engineers (IEEE) and is commonly referred to as Wi-Fi. The standard has evolved over time to include several amendments that improve speed, range, and reliability of wireless networks.
References :=
*The Most Common Wi-Fi Standards and Types, Explained
*802.11 Standards Explained: 802.11ax, 802.11ac, 802.11b/g/n, 802.11a
*Wi-Fi Standards Explained - GeeksforGeeks
NEW QUESTION # 33
You need to connect a computer's network adapter to a switch using a 1000BASE-T cable.
Which connector should you use?
- A. RJ-45
- B. OS2 LC
- C. RJ-11
- D. Coax
Answer: A
Explanation:
* 1000BASE-T Cable: This refers to Gigabit Ethernet over twisted-pair cables (Cat 5e or higher).
* Connector: RJ-45 connectors are used for Ethernet cables, including those used for 1000BASE-T.
* Coax: Used for cable TV and older Ethernet standards like 10BASE2.
* RJ-11: Used for telephone connections.
* OS2 LC: Used for fiber optic connections.
Reference: * Ethernet Standards and Cables: Ethernet Cable Guide
NEW QUESTION # 34
HOTSPOT
You plan to use a network firewall to protect computers at a small office. For each statement about firewalls, select True or False.
Note: You will receive partial credit for each correct selection.
Answer:
Explanation:
Explanation:
A firewall can direct all web traffic to a specific IP address.
True: Firewalls can be configured to perform Network Address Translation (NAT) and port forwarding, which can direct all web traffic (typically on port 80 and 443) to a specific internal IP address.
A firewall can block traffic to specific ports on internal computers.
True: Firewalls can be configured with access control lists (ACLs) or rules to block traffic to specific ports on internal computers, enhancing security by restricting unwanted or harmful traffic.
A firewall can prevent specific apps from running on a computer.
False: Firewalls typically control traffic flow and do not prevent specific applications from running on a computer. Application control is usually managed by endpoint security software or application control systems.
Directing Web Traffic: Firewalls can manage traffic redirection using NAT and port forwarding rules to route web traffic to designated servers or devices within the network.
Blocking Specific Ports: Firewalls can enforce security policies by blocking or allowing traffic based on port numbers, ensuring that only permitted traffic reaches internal systems.
Application Control: While firewalls manage network traffic, preventing applications from running typically requires software specifically designed for endpoint protection and application
management.
Reference: Understanding Firewalls: Firewall Capabilities
Network Security Best Practices: Network Security Guide
NEW QUESTION # 35
HOTSPOT
Computers in a small office are unable to access companypro.net. You run the ipconfig command on one of the computers.
The results are shown in the exhibit.
You need to determine if you can reach the router.
Which command should you use? Complete the command by selecting the correct options from each drop-down lists.
Answer:
Explanation:
Explanation:
To determine if you can reach the router, you should use the ping command followed by the IP address of the router. The ping command is a network utility used to test the reachability of a host on an Internet Protocol (IP) network and to measure the round-trip time for messages sent from the originating host to a destination computer.
The Default Gateway in the ipconfig results is typically the router's IP address in a home or small office network. In this case, the Default Gateway is 192.168.0.1, which is the address you would ping to check connectivity to the router.
Reference: =
How to Use the Ping Command
Testing Network Connectivity with the Ping Command
To determine if you can reach the router, you should use the ping command with the IP address of the router.
Command: ping
Target: 192.168.0.1
So, the completed command is:
ping 192.168.0.1
Step by Step Comprehensive and Detailed Explanation.
ping: The ping command sends ICMP Echo Request messages to the target IP address and waits for an Echo Reply. It is commonly used to test the reachability of a network device.
192.168.0.1: This is the IP address of the default gateway (the router) as shown in the ipconfig output. Pinging this address will help determine if the computer can communicate with the router.
Reference: Using the ping Command: ping Command Guide
NEW QUESTION # 36
A help desk technician receives the four trouble tickets listed below.
Which ticket should receive the highest priority and be addressed first?
- A. Ticket 3: A user reports that response time for a cloud-based application is slower than usual.
- B. Ticket 4: Two users report that wireless access in the cafeteria has been down for the last hour.
- C. Ticket 1: A user requests relocation of a printer to a different network jack in the same office. The jack must be patched and made active.
- D. Ticket 2: An online webinar is taking place in the conference room. The video conferencing equipment lost internet access.
Answer: D
Explanation:
When prioritizing trouble tickets, the most critical issues affecting business operations or high-impact activities should be addressed first.
Here's a breakdown of the tickets:
Ticket 1: Relocation of a printer, while necessary, is not urgent and does not impact critical operations.
Ticket 2: An ongoing webinar losing internet access is critical, especially if the webinar is time-sensitive and involves multiple participants.
Ticket 3: Slower response time for a cloud-based application is important but typically not as urgent as a complete loss of internet access for a live event.
Ticket 4: Wireless access down in the cafeteria affects users but does not have the same immediate impact as a live webinar losing connectivity.
Thus, the correct answer is B. Ticket 2: An online webinar is taking place in the conference room. The video conferencing equipment lost internet access.
Reference: =
IT Help Desk Best Practices
Prioritizing IT Support Tickets
NEW QUESTION # 37
HOTSPOT
You want to list the IPv4 addresses associated with the host name www.companypro.net.
Complete the command by selecting the correct option from each drop-down list.
Answer:
Explanation:
Explanation:
To list the IPv4 addresses associated with the host name www.companypro.net, you should use the following command:
nslookup www.companypro.net
This command will query the DNS servers to find the IP address associated with the hostname provided. If you want to ensure that it returns the IPv4 address, you can specify the -type=A option, which stands for Address records that hold IPv4 addresses1. However, the nslookup command by default should return the IPv4 address if available.
To list the IPv4 addresses associated with the host name www.companypro.net, you should use the nslookup command.
Command: nslookup
Target: www.companypro.net
So, the completed command is:
nslookup www.companypro.net
nslookup: This command is used to query the Domain Name System (DNS) to obtain domain name or IP address mapping or for any other specific DNS record.
www.companypro.net: This is the domain name you want to query to obtain its associated IP addresses.
Reference: Using nslookup: nslookup Command Guide
NEW QUESTION # 38
Move each protocol from the list on the left to its correct example on the right.
Answer:
Explanation:
Explanation:
The correct matching of the protocols to their examples is as follows:
* DHCP: Assign the reserved IP address 10.10.10.200 to a web server at your company.
* DNS: Perform a query to translate companypro.net to an IP address.
* ICMP: Perform a ping to ensure that a server is responding to network connections.
Here's how each protocol corresponds to its example:
* DHCP (Dynamic Host Configuration Protocol) is used to assign IP addresses to devices on a network. In this case, DHCP would be used to assign the reserved IP address 10.10.10.200 to a web server.
* DNS (Domain Name System) is used to translate domain names into IP addresses. Therefore, to translate companypro.net to an IP address, DNS would be utilized.
* ICMP (Internet Control Message Protocol) is used for sending error messages and operational information indicating success or failure when communicating with another IP address. An example of this is using the ping command to check if a server is responding to network connections.
These protocols are essential for the smooth operation of networks and the internet.
* Perform a query to translate companypro.net to an IP address.
* DNS (Domain Name System): DNS is used to resolve domain names to IP addresses.
* Assign the reserved IP address 10.10.10.200 to a web server at your company.
* DHCP (Dynamic Host Configuration Protocol): DHCP is used to assign IP addresses to devices on a network.
* Perform a ping to ensure that a server is responding to network connections.
* ICMP (Internet Control Message Protocol): ICMP is used by network devices to send error messages and operational information, and it is the protocol used by the ping command.
* DNS (Domain Name System): DNS translates human-friendly domain names like "companypro.net" into IP addresses that computers use to identify each other on the network.
* DHCP (Dynamic Host Configuration Protocol): DHCP automatically assigns IP addresses to devices on a network, ensuring that no two devices have the same IP address.
* ICMP (Internet Control Message Protocol): ICMP is used for diagnostic or control purposes, and the ping command uses ICMP to test the reachability of a host on an IP network.
References:
* DNS Basics: What is DNS?
* DHCP Overview: What is DHCP?
* ICMP and Ping: Understanding ICMP
NEW QUESTION # 39
DRAG DROP
Move each network type from the list on the left to the correct example on the right.
Answer:
Explanation:
Explanation:
Two home office computers are connected to a switch by Ethernet cables.
Network Type: LAN (Local Area Network)
A LAN connects devices within a limited area such as a home, office, or building, using Ethernet cables or Wi-Fi.
Three government buildings in the same city connect to a cable company over coaxial cables. Network Type: MAN (Metropolitan Area Network)
A MAN connects networks across a city or campus, often using fiber optic or coaxial cables.
A cell phone connects to a Bluetooth headset.
Network Type: PAN (Personal Area Network)
A PAN connects devices within a personal workspace, typically using wireless technologies like Bluetooth.
A financial institution connects its branches through a telecommunications service provider. Network Type: WAN (Wide Area Network)
A WAN connects multiple LANs over long distances, often using leased lines or satellite links provided by telecommunications companies.
LAN (Local Area Network): Used for connecting devices within a small geographical area such as a single building or home.
MAN (Metropolitan Area Network): Covers a larger geographical area than a LAN, typically a city or campus.
PAN (Personal Area Network): Connects devices within the range of an individual person, such as connecting a phone to a Bluetooth headset.
WAN (Wide Area Network): Spans large geographical areas, connecting multiple LANs across cities, countries, or continents.
Reference: Network Types Overview: Cisco Networking Basics
Understanding Different Network Types: Network Types Guide
NEW QUESTION # 40
Which component of the AAA service security model provides identity verification?
- A. Auditing
- B. Accounting
- C. Authorization
- D. Authentication
Answer: D
Explanation:
The AAA service security model consists of three components: Authentication, Authorization, and Accounting.
*Authentication: This is the process of verifying the identity of a user or device. It ensures that only legitimate users can access the network or service.
*Authorization: This determines what an authenticated user is allowed to do or access within the network.
*Auditing/Accounting: This component tracks the actions of the user, including what resources they access and what changes they make.
Thus, the correct answer is C. Authentication.
References :=
*Cisco AAA Overview
*Understanding AAA (Authentication, Authorization, and Accounting)
NEW QUESTION # 41
You purchase a new Cisco switch, turn it on, and connect to its console port. You then run the following command:
For each statement about the output, select True or False.
Note: You will receive partial credit for each correct selection.
Answer:
Explanation:
Explanation:
* The two interfaces are administratively shut down:
* False: The output does not show any "shutdown" command under the interfaces, which would indicate that they are administratively shut down. Therefore, they are likely in their default state, which is administratively up.
* The two interfaces have default IP addresses assigned:
* False: The output does not show any IP address configuration. In the default state, interfaces do not have IP addresses assigned unless explicitly configured.
* The two interfaces can communicate over Layer 2:
* True: By default, interfaces on a switch are Layer 2 interfaces capable of forwarding Ethernet frames. As there is no configuration provided that changes this, it can be assumed they can communicate over Layer 2.
* Interface Status: The absence of the "shutdown" command means the interfaces are not administratively shut down.
* IP Address Assignment: There is no evidence in the output that IP addresses have been assigned to the interfaces, which would typically be shown as "ip address" entries.
* Layer 2 Communication: Switch interfaces in their default state operate at Layer 2, enabling them to forward Ethernet frames and participate in Layer 2 communication.
References:
* Cisco IOS Interface Configuration: Cisco Interface Configuration
* Understanding Cisco Switch Interfaces: Cisco Switch Interfaces
NEW QUESTION # 42
HOTSPOT
An app on a user's computer is having problems downloading data.
The app uses the following URL to download data: https://www.companypro.net:7100/api
You need to use Wireshark to capture packets sent to and received from that URL.
Which Wireshark filter options would you use to filter the results? Complete the command by selecting the correct option from each drop-down list.
Note: You will receive partial credit for each correct selection.
Answer:
Explanation:
Explanation:
To capture packets sent to and received from the URL https://www.companypro.net:7100/api using
Wireshark, you would use the following filter options:
Protocol: tcp
Filter Type: port
Port Number: 7100
This filter setup in Wireshark will display all TCP packets that are sent to or received from port 7100, which is the port specified in the URL for the API service. Since HTTPS typically uses TCP as the transport layer protocol, filtering by TCP and the specific port number will help isolate the relevant packets for troubleshooting the app's data download issues.
tcp: The app is using HTTPS, which relies on the TCP protocol for communication.
port: The specific port number used by the application, which in this case is 7100.
7100: This is the port specified in the URL (https://www.companypro.net:7100/api).
This filter will capture all TCP traffic on port 7100, allowing you to analyze the packets related to the application's data download.
Reference: Wireshark Filters: Wireshark Display Filters
NEW QUESTION # 43
Which protocol allows you to securely upload files to another computer on the internet?
- A. SFTP
- B. HTTP
- C. NTP
- D. ICMP
Answer: A
Explanation:
SFTP, or Secure File Transfer Protocol, is a protocol that allows for secure file transfer capabilities between networked hosts. It is a secure extension of the File Transfer Protocol (FTP). SFTP encrypts both commands and data, preventing passwords and sensitive information from being transmitted openly over the network. It is typically used for secure file transfers over the internet and is built on the Secure Shell (SSH) protocol1.
References :=
*What Is SFTP? (Secure File Transfer Protocol)
*How to Use SFTP to Safely Transfer Files: A Step-by-Step Guide
*Secure File Transfers: Best Practices, Protocols And Tools
The Secure File Transfer Protocol (SFTP) is a secure version of the File Transfer Protocol (FTP) that uses SSH (Secure Shell) to encrypt all commands and data. This ensures that sensitive information, such as usernames, passwords, and files being transferred, are securely transmitted over the network.
*ICMP (Internet Control Message Protocol) is used for network diagnostics and is not designed for file transfer.
*NTP (Network Time Protocol) is used to synchronize clocks between computer systems and is not related to file transfer.
*HTTP (HyperText Transfer Protocol) is used for transmitting web pages over the internet and does not inherently provide secure file transfer capabilities.
Thus, the correct protocol that allows secure uploading of files to another computer on the internet is SFTP.
References :=
*Cisco Learning Network
*SFTP Overview (Cisco)
NEW QUESTION # 44
A local company requires two networks in two new buildings. The addresses used in these networks must be in the private network range.
Which two address ranges should the company use? Note: You will receive partial credit for each correct selection. (Choose 2.)
- A. 11.0.0.0 to 11.255.255.255
- B. 192.16.0.0 to 192.16.255.255
- C. 172.16.0.0 to 172.31.255.255
- D. 192.168.0.0 to 192.168.255.255
Answer: C,D
Explanation:
The private IP address ranges that are set aside specifically for use within private networks and not routable on the internet are as follows:
Class A: 10.0.0.0 to 10.255.255.255
Class B: 172.16.0.0 to 172.31.255.255
Class C: 192.168.0.0 to 192.168.255.255
These ranges are defined by the Internet Assigned Numbers Authority (IANA) and are used for local communications within a private network123.
Given the options:
A). 172.16.0.0 to 172.31.255.255 falls within the Class B private range.
B). 192.16.0.0 to 192.16.255.255 is not a recognized private IP range.
C). 11.0.0.0 to 11.255.255.255 is not a recognized private IP range.
D). 192.168.0.0 to 192.168.255.255 falls within the Class C private range.
Therefore, the correct selections that the company should use for their private networks are A and D.
Reference: =
Reserved IP addresses on Wikipedia
Private IP Addresses in Networking - GeeksforGeeks
Understanding Private IP Ranges, Uses, Benefits, and Warnings
NEW QUESTION # 45
A help desk technician receives the four trouble tickets listed below. Which ticket should receive the highest priority and be addressed first?
- A. Ticket 3: A user reports that response time for a cloud-based application is slower than usual.
- B. Ticket 4: Two users report that wireless access in the cafeteria has been down for the last hour.
- C. Ticket 1: A user requests relocation of a printer to a different network jack in the same office. The jack must be patched and made active.
- D. Ticket 2: An online webinar is taking place in the conference room. The video conferencing equipment lost internet access.
Answer: D
Explanation:
When prioritizing trouble tickets, the most critical issues affecting business operations or high-impact activities should be addressed first. Here's a breakdown of the tickets:
* Ticket 1: Relocation of a printer, while necessary, is not urgent and does not impact critical operations.
* Ticket 2: An ongoing webinar losing internet access is critical, especially if the webinar is time- sensitive and involves multiple participants.
* Ticket 3: Slower response time for a cloud-based application is important but typically not as urgent as a complete loss of internet access for a live event.
* Ticket 4: Wireless access down in the cafeteria affects users but does not have the same immediate impact as a live webinar losing connectivity.
Thus, the correct answer is B. Ticket 2: An online webinar is taking place in the conference room. The video conferencing equipment lost internet access.
References :=
* IT Help Desk Best Practices
* Prioritizing IT Support Tickets
NEW QUESTION # 46
During the data encapsulation process, which OSI layer adds a header that contains MAC addressing information and a trailer used for error checking?
- A. Network
- B. Transport
- C. Session
- D. Data Link
Answer: D
Explanation:
During the data encapsulation process, the Data Link layer of the OSI model is responsible for adding a header that contains MAC addressing information and a trailer used for error checking. The header typically includes the source and destination MAC addresses, while the trailer contains a Frame Check Sequence (FCS) which is used for error detection1.
The Data Link layer ensures that messages are delivered to the proper device on a LAN using hardware addresses and translates messages from the Network layer into bits for the Physical layer to transmit. It also controls how data is placed onto the medium and is received from the medium through the physical hardware.
Reference: =
The OSI Model - The 7 Layers of Networking Explained in Plain English
OSI Model - Network Direction
Which layer adds both header and trailer to the data?
What is OSI Model | 7 Layers Explained - GeeksforGeeks
NEW QUESTION # 47
......
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