Question 16 (1 point)

In a distance-vector routing algorithm, each node has a map of the entire network and determines the shortest path from itself to all other nodes in the network.

Question 16 options:

TrueFalse

Question 17 (1 point)

In the BGP routing algorithm, each AS advertises to its neighbors its estimates of the shortest distances from the AS to all possible destination ASs.

Question 17 options:

TrueFalse

Question 18 (1 point)

CRC error detection, as used in Ethernet, is always able to detect whether there is an error in a frame.

Question 18 options:

TrueFalse

Question 19 (1 point)

A gateway router must run both an intra-AS routing algorithm and an inter-AS routing algorithm.

Question 19 options:

TrueFalse

Question 16:

In a distance-vector routing algorithm, each node has a map of the entire network and determines the shortest path from itself to all other nodes in the network.

Answer: False

• Explanation: No node has complete information about the costs of all network links. Instead, each node begins with only knowledge of the costs of its own directly attached links and then through an iterative process of calculation and exchange of information with its neighboring nodes (i.e., nodes which are at the "other end" of links to which it itself is attached) gradually calculates the least cost path to a destination, or set of destinations.

Question 17:

In the BGP routing algorithm, each AS advertises to its neighbors its estimates of the shortest distances from the AS to all possible destination ASs.

Answer: False

• Explanation: If the router does not have a route to that destination from any non-BGP source, the withdrawn route will be removed from the main routing table.

Question 18:

CRC error detection, as used in Ethernet, is always able to detect whether there is an error in a frame.

Answer: False

• Explanation: CRC error detection does not always detect whether there is an error in a frame. It is an an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data.

Question 19:

A gateway router must run both an intra-AS routing algorithm and an inter-AS routing algorithm.

Answer: True

• Explanation: A router runs the intra-AS routing protocol to obtain routes to all the networks and routers within the AS