AMCAT Computer Networks

Question 1

Which layer of the OSI model is responsible for end-to-end communication and error recovery between hosts?

Accepted Answer

Transport Layer

Answer

The Transport Layer (Layer 4) provides end-to-end communication, error recovery, and flow control between source and destination hosts.

Question 2

What is the maximum number of hosts that can be assigned in a Class C IP network?

Accepted Answer

254

Answer

A Class C network has 8 host bits, giving 2^8 = 256 addresses, but 2 are reserved (network and broadcast), leaving 254 usable host addresses.

Question 3

Which protocol is used to automatically assign IP addresses to devices on a network?

Accepted Answer

DHCP

Answer

DHCP (Dynamic Host Configuration Protocol) automatically assigns IP addresses, subnet masks, gateways, and DNS servers to network devices.

Question 4

In a network with subnet mask 255.255.255.192, how many subnets and hosts per subnet are created from a Class C address?

Accepted Answer

4 subnets, 62 hosts

Answer

255.255.255.192 = /26, borrowing 2 bits gives 4 subnets, and the remaining 6 host bits yield 2^6 - 2 = 62 usable hosts per subnet.

Question 5

Which of the following is a connection-oriented protocol at the Transport Layer?

Accepted Answer

TCP

Answer

TCP (Transmission Control Protocol) is connection-oriented, establishing a connection via a three-way handshake before data transfer begins.

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