Q2. Multiple Choice on General Concepts a (i) The CSMA/CD MAC protocol cannot be used over wireless channels because: (select correct statements) a. Carrier sensing is not feasible on the wireless medium b. Radios are half-duplex and can either transmit or receive at any time c. Collision detection is difficult on wireless because of varying signal strength d. Wireless channels are associated with hidden node problems (ii) This question is about packet switching used in the Internet. Select ALL of the stateme that are CORRECT: a. A key advantage of packet switching is statistical multiplexing of bandwidth. b. Packet switching offers better quality-of-service than circuit switching. c. Packet switching requires an end-to-end path to be set up in advance for each flow. d. Packet switches and routers do not normally maintain per flow state. e. Data packets may be lost or delivered out-of-order in packet networks. (iii) Which of the statements about protocol architecture are CORRECT? Check all that a Packet network protocols are structured into layers such as ISO 7-layer or IP 4-layer. b. Protocol syntax refers to structure and information fields in control and data packets. Protocol semantics refers to actions to be performed on each packet. d. Algorithms for functions such as routing are not a part of the core protocol specificatia Routing algorithms used in the IP spec include Djikstra and Bellman-Ford. (iv) Given an IP CIDR prefix 10.0.0.0/18, which of the following statements is TDIE? a. The prefix length is 14 and the remaining 18 bits can be used to represent 2¹ IP addre within the prefix. b. The prefix length is 14 and the remaining 14 bits can be used to represent 2¹4 IP within the prefix. addre c. IP addresses inside the prefix share the bottom 14 bits. d. The prefix length is 18 and the remaining 14 bits can be used to represent 2¹4 IP addr within the prefix. (v) Which of the following are CORRECT for BGP. Check all that apply: a. A BGP router sometimes picks the path with the least number of router hops.
Q2. Multiple Choice on General Concepts a (i) The CSMA/CD MAC protocol cannot be used over wireless channels because: (select correct statements) a. Carrier sensing is not feasible on the wireless medium b. Radios are half-duplex and can either transmit or receive at any time c. Collision detection is difficult on wireless because of varying signal strength d. Wireless channels are associated with hidden node problems (ii) This question is about packet switching used in the Internet. Select ALL of the stateme that are CORRECT: a. A key advantage of packet switching is statistical multiplexing of bandwidth. b. Packet switching offers better quality-of-service than circuit switching. c. Packet switching requires an end-to-end path to be set up in advance for each flow. d. Packet switches and routers do not normally maintain per flow state. e. Data packets may be lost or delivered out-of-order in packet networks. (iii) Which of the statements about protocol architecture are CORRECT? Check all that a Packet network protocols are structured into layers such as ISO 7-layer or IP 4-layer. b. Protocol syntax refers to structure and information fields in control and data packets. Protocol semantics refers to actions to be performed on each packet. d. Algorithms for functions such as routing are not a part of the core protocol specificatia Routing algorithms used in the IP spec include Djikstra and Bellman-Ford. (iv) Given an IP CIDR prefix 10.0.0.0/18, which of the following statements is TDIE? a. The prefix length is 14 and the remaining 18 bits can be used to represent 2¹ IP addre within the prefix. b. The prefix length is 14 and the remaining 14 bits can be used to represent 2¹4 IP within the prefix. addre c. IP addresses inside the prefix share the bottom 14 bits. d. The prefix length is 18 and the remaining 14 bits can be used to represent 2¹4 IP addr within the prefix. (v) Which of the following are CORRECT for BGP. Check all that apply: a. A BGP router sometimes picks the path with the least number of router hops.
Chapter9: Computer Networks
Section: Chapter Questions
Problem 9VE
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Transcribed Image Text:Q2. Multiple Choice on General Concepts a
(i) The CSMA/CD MAC protocol cannot be used over wireless channels because: (select all
correct statements)
a. Carrier sensing is not feasible on the wireless medium
b. Radios are half-duplex and can either transmit or receive at any time
c. Collision detection is difficult on wireless because of varying signal strength
d. Wireless channels are associated with hidden node problems
(ii) This question is about packet switching used in the Internet. Select ALL of the statements
that are CORRECT:
a. A key advantage of packet switching is statistical multiplexing of bandwidth.
b. Packet switching offers better quality-of-service than circuit switching.
c. Packet switching requires an end-to-end path to be set up in advance for each flow.
d. Packet switches and routers do not normally maintain per flow state.
e. Data packets may be lost or delivered out-of-order in packet networks.
(iii) Which of the statements about protocol architecture are CORRECT? Check all that apply.
Packet network protocols are structured into layers such as ISO 7-layer or IP 4-layer.
b. Protocol syntax refers to structure and information fields in control and data packets.
Protocol semantics refers to actions to be performed on each packet.
d. Algorithms for functions such as routing are not a part of the core protocol specification
Routing algorithms used in the IP spec include Djikstra and Bellman-Ford.
(iv) Given an IP CIDR prefix 10.0.0.0/18, which of the following statements is TOE?
a. The prefix length is 14 and the remaining 18 bits can be used to represent 2¹ IP addresses
within the prefix.
b. The prefix length is 14 and the remaining 14 bits can be used to represent 2¹4 IP addresses
within the prefix.
c. IP addresses inside the prefix share the bottom 14 bits.
d. The prefix length is 18 and the remaining 14 bits can be used to represent 2¹4 IP addresses
within the prefix.
(v) Which of the following are CORRECT for BGP. Check all that apply:
a. A BGP router sometimes picks the path with the least number of router hops.
b. A BGP router always picks the path with the least number of AS hops.
c. An AS will announce routes learned from its customers to its peers.
d. If an AS learns of 5 different routes to a destination prefix, it will announce all 5 routes to
its neighbors.
e. BGP requires strictly hierarchical address allocation using CIDR.
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