200-301 · Question #749
Which two statements correctly describe distance-vector routing protocols? (Choose two)
The correct answer is A. they specify the next hop toward the destination subnet E. they use a variety of metrics to identify the distance to a destination network. Distance-vector routing protocols determine the best path to a destination by exchanging routing tables with neighbors and specify the next hop based on various metrics to identify the 'distance'.
Question
Options
- Athey specify the next hop toward the destination subnet
- Bthey require quick network convergence to support normal operations
- Cthey generate a complete topology of the network
- Dthey update other devices on the network when one device detects a topogy chage
- Ethey use a variety of metrics to identify the distance to a destination network.
How the community answered
(47 responses)- A87% (41)
- B6% (3)
- C2% (1)
- D4% (2)
Why each option
Distance-vector routing protocols determine the best path to a destination by exchanging routing tables with neighbors and specify the next hop based on various metrics to identify the 'distance'.
Distance-vector protocols inherently calculate the next-hop router that packets should take to reach a destination subnet by determining the best direction (vector) and distance.
Distance-vector protocols, particularly older ones like RIP, are known for slower convergence times compared to link-state protocols due to issues like count-to-infinity.
Distance-vector protocols do not build a complete topology map of the network; instead, each router maintains only its own routing table, learning paths from its immediate neighbors.
Distance-vector protocols propagate topology changes hop-by-hop to their neighbors, rather than immediately updating all other devices across the entire network.
Distance-vector routing protocols utilize various metrics, such as hop count (RIP) or a composite metric (EIGRP) considering bandwidth, delay, reliability, and load, to quantify the 'distance' to a destination network.
Concept tested: Distance-vector routing protocol characteristics
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_rip/configuration/15-mt/rip-15-mt-book/rip-cfg-ip-rout.html
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