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IP Routing 3

November 7th, 2018 Go to comments

Question 1


Floating static routes are static routes that have an administrative distance greater than the administrative distance (AD) of another static route or dynamic routes. By default a static route has an AD of 1 then floating static route must have the AD greater than 1. Floating static route has a manually configured administrative distance greater than that of the primary route and therefore would not be in the routing table until the primary route fails.

Question 2


A host route for IPv4 has the mask /32, and a host route for IPv6 has the mask /128. If an IPv4 address is configured with a mask of /32 on an interface of the router, which is typical for loopback interfaces, the host route appears in the routing table only as connected (for example in the routing table we will see this line: “C is directly connected, Loopback0”.

Reference: https://www.cisco.com/c/en/us/support/docs/ip/ip-routing/116264-technote-ios-00.html

Question 3


If the IP address exists in the routing table then we can say the local router knew the way to reach that destination. But this question wants to ask if the destination has communicated to the local router or not (“an IP address is known to a router”). Maybe it is a tricky question.

Question 4


In all the way on the path, the source and destination IP addresses never change, only the source and destination MAC address are changed on each segment.

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11


To check the connectivity between a host and a destination (through some networks) we can use both “tracert” and “ping” commands. But the difference between these 2 commands is the “tracert” command can display a list of near-side router interfaces in the path between the source and the destination. The “traceroute” command has the same function of the “tracert” command but it is used on Cisco routers only, not on a PC -> B is correct.

Comments (1) Comments
  1. Q6 An Q7
    December 13th, 2019

    if you realize Q6 and Q7 is exactly the same But with defferents answer. I guess the right answer is: “prefers the directly connected interface”. I agree with UUR.

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