Network Layer

Question 61

A supernet has a first address of 205.16.32.0 and a supernet mask of 255.255.248.0. A router receives 4 packets with the following destination addresses. Which packet belongs to this supernet?

• 205.16.42.56
• 205.17.32.76
• 205.16.31.10
• 205.16.39.44

Question 62

An organization is granted the block 130.34.12.64/26. It needs to have 4 subnets. Which of the following is not an address of this organization?

• 130.34.12.124
• 130.34.12.89
• 130.34.12.70
• 130.34.12.132

Question 63

A pure ALOHA Network transmits 200 bit frames using a shared channel with 200 Kbps bandwidth. If the system (all stations put together) produces 500 frames per second, then the throughput of the system is ______.

• 0.384
• 0.184
• 0.286
• 0.586

Question 64

IPv6 does not support which of the following addressing modes?

• unicast addressing
• multicast addressing
• broadcast addressing
• anycast addressing

Question 65

What is IP class and number of sub-networks if the subnet mask is 255.224.0.0?

• Class A, 3
• Class A, 8
• Class B, 3
• Class B, 32

Question 66

Which of the following fields in IPV₄ datagram is not related to fragmentation?

• Type of service
• Fragment offset
• Flags
• Identification

Question 67

Which of the following is not a congestion policy at network layer?

• Flow Control Policy
• Packet Discard Policy
• Packet Lifetime Management Policy
• Routing Algorithm

Question 68

A network with bandwidth of 10 Mbps can pass only an average of 15,000 frames per minute with each frame carrying an average of 8,000 bits. What is the throughput of this network?

• 2 Mbps
• 60 Mbps
• 120 Mbps
• 10 Mbps

Question 69

Use of IPSEC in tunnel mode results in

• IP packet with same header
• IP packet with new header
• IP packet without header
• No changes in IP packet

Question 70

On a LAN ,where are IP datagrams transported?

• In the LAN header
• In the application field
• In the information field of the LAN frame
• After the TCP header