ICT - Information Communication Technology Networking Models and Protocols Questions and Answers

Question 1

A network technician is troubleshooting an issue where a user can ping a web server by its IP address but cannot browse the website using its domain name.
Other users on the same network are not experiencing this issue.
Which of the following protocols is most likely the cause of this specific user's problem?

Accepted Answer

DNS (Domain Name System)

Answer

DHCP (Dynamic Host Configuration Protocol)

Answer

TCP (Transmission Control Protocol)

Answer

ARP (Address Resolution Protocol)

Question 2

Which of the following scenarios is best suited for using the User Datagram Protocol (UDP) instead of the Transmission Control Protocol (TCP)?

Accepted Answer

Streaming a live video conference.

Answer

Transferring a large financial database file.

Answer

Sending an email with an important attachment.

Answer

Downloading a software application from a website.

Question 3

A technician is using the OSI model to troubleshoot a network outage. After verifying that the network cables are properly connected and the link lights on the switch are active, they move to the next layer. At which layer of the OSI model are they now troubleshooting, and what technology operates at this layer?

Accepted Answer

Layer 2 (Data Link Layer), Switches and MAC Addresses

Answer

Layer 3 (Network Layer), Routers

Answer

Layer 4 (Transport Layer), TCP/UDP Ports

Answer

Layer 1 (Physical Layer), Hubs

Question 4

In the TCP/IP model, which layer is responsible for logical addressing, routing, and path determination for data packets across different networks?

Accepted Answer

Internet Layer

Answer

Application Layer

Answer

Transport Layer

Answer

Network Access Layer

Question 5

Which layer of the OSI model is responsible for establishing, managing, and terminating connections between applications on different hosts?

Accepted Answer

Session Layer

Answer

Transport Layer

Answer

Application Layer

Answer

Presentation Layer

Question 6

A user reports that they are unable to access any external websites. A technician runs the `ipconfig` command on the user's computer and finds that the IP address is 169.254.10.22. What protocol has failed to operate correctly?

Accepted Answer

DHCP (Dynamic Host Configuration Protocol)

Answer

DNS (Domain Name System)

Answer

FTP (File Transfer Protocol)

Answer

SMTP (Simple Mail Transfer Protocol)