Lecture-5

What is the primary function of the Internet Protocol (IP)?

• a. Establishing connections between processes on hosts

• b. Defining and describing the format of IP packets

• c. Controlling network congestion

• • d. Providing error checking and recovery

What does the Version field in an IP packet header indicate?

• a. The length of the IP header

• b. The type of service

• c. The version of the IP protocol (e.g., IPv4 or IPv6)

• • d. The total length of the IP packet

Which protocol number is used to identify TCP in the Protocol field of an IP header?

• 1

• 2

• 6

• 17

What happens to the TTL (Time to Live) value each time a packet passes through a router?

• a. It increases by 1

• b. It is reset to the initial value

• c. It decreases by 1

• • d. It remains unchanged

What is the purpose of the Fragment Offset field in an IP packet header?

• a. To specify the maximum number of routers a packet can pass through

• b. To indicate the size of the IP header

• c. To identify the relative position of a fragment in the original packet

• • d. To identify the protocol used by the data carried in the packet

What does a value of 0 in the "Don't Fragment" flag indicate?

• a. Fragmentation is not allowed

• b. Fragmentation is allowed

• c. The packet is the last fragment

• • d. The packet is not the last fragment

What is the maximum size of an IP header if the Option field is used?

• 20 bytes

• 40 bytes

• 60 bytes

• 80 bytes

Which field in the IP packet header is used for reassembling fragmented packets?

• a. Total Length

• b. Identification

• c. Flags

• Protocol

When a packet's TTL value reaches 0, what happens to the packet?

• a. It is forwarded to the next router

• b. It is returned to the sender

• c. It is discarded

• 1. d. It is delivered to the destination host

What is the primary function of the transport layer?

• a. Routing data packets

• b. Transmitting data from one host to another

• c. Establishing connections between processes on hosts

• • d. Providing logical addresses for network devices