What is the subnet id of a host with an IP address 172.16.66.0/21?

• A. 172.16.36.0
• B. 172.16.48.0
• C. 172.16.64.0
• D. 172.16.0.0

The network address of 172.16.0.0/19 provides how many subnets and hosts?

• A. 7 subnets, 30 hosts each
• B. 8 subnets, 8,190 hosts each
• C. 8 subnets, 2,046 hosts each
• D. 7 subnets, 2,046 hosts each

Generate the CRC codeword for the data word 1101011011 using generator 10011. Also write both in the polynomial form.

• A. 1.10101e+13
• B. 1.10101e+13
• C. 1.10101e+13
• D. 1.10101e+13

A slotted ALOHA network transmits 200-bit frames using a shared channel with a 200-kbps bandwidth. Find the throughput if the system (all stations together) produces 1000 frames per second.

• A. 92 frames
• B. 368 frames
• C. 276 frames
• D. 151 frames

Find the distance from source A to destination D using Dijkstra algorithm.

• A. A-b-c-j-d-k
• B. A-b-c-g-h-d-k
• C. A-e-d-k
• D. A-e-g-h-d-k

After performing bit stuffing on the following stream : 01101111111111111110010, the output is-

• A. 1.10e+24
• B. 1.10e+24
• C. 1.00e+25
• D. 1.10e+24

A device that helps prevent congestion and data collisions –

• A. Switch
• B. Hub
• C. Gateway
• D. Proxy server

Assume we need to download text documents at the rate of 100 pages per second. What is the required bit rate of the channel?

• A. 1.846 mbps
• B. 1.536 mbps
• C. 2.4 mbps
• D. None of the mentioned

In terms of Web Security Threats, “Impersonation of another user” is a Passive Attack.

• A. True
• B. False
• C.
• D.

SONET stands for ___________

• A. Synchronous optical network
• B. Synchronous operational network
• C. Stream optical network
• D. Shell operational network