Other Routing Protocols
Here you will find answers to Other Routing Questions
Question 1
Which of these is the best routing deployment for a single dedicated link to an ISP for Internet access?
A. EIGRP
B. RIP
C. BGP
D. Static
Answer: D
Question 2
Which two routing protocols operate over NBMA point-to-multipoint networks without the use of point-to-point subinterfaces? (Choose two)
A. RIPv1
B. RIPv2
C. IGRP
D. EIGRP
E. OSPF
F. IS-IS
Answer: D E
Question 3
For which network scenario is static routing most appropriate?
A. parallel WAN links
B. IPSec VPN
C. expanding networks
D. hierarchical routing
Answer: B
Question 4
Your company uses OSPF for internal routing. The company will be connected to VendorA via a single dedicated link and to VendorB via redundant dedicated links. Both vendors also use OSPF for internal routing. Which of the following deployments describes the best intra-domain routing practice in this situation?
A. Connect your company to both VendorA and VendorB using existing OSPF.
B. Redistribute the routes on each link between your company and the vendors to a shared EIGRP routing protocol.
C. Use IBGP to reach VendorA and EBGP to reach VendorB.
D. Use static routes to reach VendorA and EBGP to reach VendorB.
E. Use static routes to reach both VendorA and VendorB.
Answer: D
???? ?? 3 ?????? ?? 2 ???????? ?? -Link ID- Neighboring Router ID: 2.2.2.2Link Data- Router Interface aesddrs: 33.33.33.3Link ID- Network/subnet number: 33.33.33.0Link Data- Network Mask: 255.255.255.0
Can someone explain Q4, why not use static routes to reach both vendors?
Anyone know if ISIS is being evaluated in the CCDA 640-864?
Q4.
Static route to Vendor A because it have only 1 link, therefore all traffic are going out with same link.
For Vendor B, it having redundant links, so you may wan to distribute load between it. This practice is much better than just only static route for Vendor B.
Q4 sounds strange to me, I know that if you already have just one link, a static route will fit better. But, the other company doesn’t have BPG, so why should I use BGP? Its weird!
Q4:
If you use Static route for preferred ISP, it will be the lowest-cost Admin distance and always preferred. Use BGP for second ISP because Admin Distances will be 20, and only used if the Static route goes away. You can redistribute the 0/0 route from either Static or from BGP into OSPF and propagate that throughout your network. Also, BGP will allow you to set route attributes.
Don’t peer OSPF with the ISP’s, because you don’t want to know about their internal routes, and you don’t want them to have your routes in their internal routing tables. If they did that with multiple customers, then customers would be able to directly route to each other.
I would use BGP for both ISP-A and ISP-B in real life. Because if you redistribute everything from BGP, then longest-match rules would have a lot of traffic using ISP-B (assuming that ISP-B sent you routes via BGP). So it’s really elimination of the other answers.
A. Discussed above
B. You would almost never run EIGRP w an ISP
C. You would never use iBGP with someone in another administrative domain
D. Mmmm, it’s a possiblity.
E. You lose the ability to do inbound route attribute manipulation