Network Technology - Chapter 4 (Network layer)

Network layer provides services to allow devices to exchange data across the network.

• TRUE

• FALSE

Which processes are adopted by the Network layer?

Select more than 1 answer.

• Addressing end devices

• Encapsulate Sender and Receiver IP address

• Routing packets from source to destination

• De-encapsulation

IP packet will be examined by Layer 3 devices as it traverses the network. Which of the following are Layer 3 devices?

Select more than 1 answer.

• Router

• NIC

• Switch

Which of the following are characteristics of IP Protocol?

Select more than 1 answer.

• Connectionless - no connection is established before sending data packets

• Best effort delivery - does not guarantee packet delivery

• Stateful - information about connection is retained for future use

• Media independent - operates independently of the medium carrying the data

Network layer receives segment from transport layer and the resulting PDU is called ______

• Packet

• Segment

• Data

• Frame

What are the purposes of the Network header?

Select more than 1 answer.

• Ensures packet is sent in the correct direction to the destination

• Contains information for network layer processing

• Information in the header is used by a Router

• Information eventually reaches the Application layer

IPv6 was developed by ______

• IEEE

• ICANN

• IETF

• NCS

What are the advantages of IPv6 over IPv4?

Select more than 1 answer

• Increased address space - 128 bits instead of 32 bits

• Improved Packet Handling - simplified header with fewer fields

• Eliminate the needs of NAT - since there is huge amount of addressing

• Requires NAT to use private addressing internally and mapped to shared public address

Which of the following is FALSE about IPv6?

• Header is fixed at 40 bytes or octets long

• IPv6 header is simplified but larger

• IPv4 fields such as Flag, Fragment offset and header checksum are removed

• IPv6 header is more complicated and larger

Host can send packet to _________

Select more than 1 answer.

• Itself - 127.0.0.1

• Local host - which is another host in the same network

• Remote host - which is another host in a different network

• Only other hosts