OSPF Questions 2
Question 1
Explanation
In IPv6, you can configure many address prefixes on an interface. In OSPFv3, all address prefixes on an interface are included by default. You cannot select some address prefixes to be imported into OSPFv3; either all address prefixes on an interface are imported, or no address prefixes on an interface are imported.
Question 3
Question 4
Explanation
Because the destination of 172.16.1.1 is not present in the routing table so this router would use the default route (O*E2) to forward this packet. Usually the O*E2 is the result of the “default-information originate” command on the upstream router.
Question 5
Question 6
Explanation
Before you enable OSPF for IPv6 on an interface, you must perform the following:
+ Complete the OSPF network strategy and planning for your IPv6 network. For example, you must decide whether multiple areas are required.
+ Enable IPv6 unicast routing.
+ Enable IPv6 on the interface.
Reference: https://www.cisco.com/c/en/us/support/docs/ip/ip-version-6-ipv6/112100-ospfv3-config-guide.html
Note: If we have already had an active interface, we don’t need to configure the router ID for OSPFv3 anymore because the device will automatically choose that IPv4 address for its router ID).
Question 7
Question 8
Explanation
Hierarchical design of OSPF (basically means that you can separate the larger internetwork into smaller internetworks called areas) helps us create a network with all features listed above (decrease routing overhead, speed up convergence, confine network instability to single areas of the network).
Question 9
Question 10
Explanation
To form an adjacency (become neighbor), router A & B must have the same Hello interval, Dead interval and AREA number.
Question 11
Question 12
In Q4 192.168.1.1 is included in route 192.168.0.0/16. So packets are sent to 192.168.15.5 out interface Fa1/1. Am I right?
I’ve just realized of my mistake. Destiny IP is 172.16.1.1, not 192.168.1.1 :-(
Answer to question 6 is wrong. Right answer is:
if ipv4 address does NOT exist: configure router id
if ipv4 address does exist: no need to configure router id
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipv6/configuration/xe-3s/ipv6-xe-36s-book/ip6-ospf.html#GUID-C38CCDD0-560F-4CD2-A199-13930C6B0FE9
Answer to Q6 should be D and E because we dont need to configure router id as the router already configured for ipv4.
@9tut
Question 6 – How do we create IPv4 router id ? you have to configure it inside the ipv6 router ospf 1 !that means while your creating the ospv3 process. The question is” Before ” you implement ospfv3. so the correct answer would be E- enable ipv6 unicast routing and D- Enable IPv6 on an interface
Question 6 – discard the previous post
If two OSPF neighbors have formed complete adjacency and are exchanging link-state advertisements, which state have they reached?
A. Exstart
B. 2-Way
C. FULL
D. Exchange
the answer is D,,,
the question is clearly saying are exchanging not done exchanging!
if it was done exchanging then Full which is C
@come on: exchange is not a valid OSPF state, is part of the relation forming process. Full is the correct answer here.
Question 10 does not give enough information. The configurations are missing
Q5. DELES, exchange is a totally valid OSPF state which described in RFC 2328 10.1.
There is a link: https://www.ietf.org/rfc/rfc2328.txt
But yes, in exchange state routers are sending Database Description packets to the neighbor, but no more (I do not quite understand whether the LSR transmission is also in the state of Exchange or not. In any case there are no any fully LSAs.).
So the only right question is FULL. I guess “are exchanging link-state advertisements” words refer to new changes in a network.
are these OSPF eigrp questions includes sim questions as well ?? do i have to perform the practical or can i just select the right answer if i already know the answer because of dumps .
Q3 is correct ? Or answer correct is C. Configure an IPv4 address on interface Fa0/0 beacause said ospf no ospfv3.
@Come on, the answer is FULL, not because of what @DELES says, exchange is actually a valid OSPF state, but because neighbors have formed complete adjacency which only occurs at FULL state. At EXCHANGE, database data is transferred but adjacency is not complete (routers have not converged)
please i need dump questions.. on ospf
am writing next week quantisol 4 at gmail.com
Q3??? how is the answer A? if the destination ip address is not known the router will drop the packet! right??
why i cant see the question ? can someone explain to me. Thanks you
Q1 explanation should be in Q2 as Q1 is about Link-state protocols. Please fix.