Test your basic knowledge |

CCNP Route

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What kind of routing protocol is run within an AS?
After a neighbor is configured - BGP sends an open message to try to establish peering with that neighbor. Includes information such as autonomous system number - router ID - and hold time.
The network backdoor router configuration command causes the administrative distance assigned to the network to be forced to 200. The goal is to make Interior Gateway Protocol (IGP) learned routes preferred.
Interior Gateway Protocol(IGP)
BGP peer groups would be ideal for this situation.

2. What is the correct command to view the BGP table on the local router?
OSPF uses IP protocol number 89.
The correct command is show ip bgp.
Mismatched MTU - Corrupted link-state request packet
BGP peer groups would be ideal for this situation.

3. How does EIGRP deal with a router that is slow in responding to reliable packets with acknowledgements?
The Cisco mode of Broadcast requires a full mesh topology.
The default value of the MED attribute is 0.
Type 7 LSAs are special external routes that you permit in a Not-So-Stubby area.
Slow neighbors are sent unicast packets in an attempt to resolve issues with slow neighbors.

4. In a LAN - with which router(s) does a DROTHER form an adjacency?
Aggregator - Community
Router(config-router)# neighbor ip-address route-reflector-client
For an OSPF router to advertise a default route into an area - the command default-information originate must be used. If the advertising router does not possess a default route in its routing table - you can use the always keyword to still generate
DROTHERs form an adjacency with the DR and BDR.

5. You need to change the default local preference value applied to all updates coming from external neighbors or originating locally. What command should you use?
A Priority value of 0 is configured on all routers.
Router(config-router)# neighbor ip-address route-reflector-client
EIGRP uses up to 50 percent of the bandwidth (as set by the bandwidth command) for its operations.
Use the bgp default local-preference command to change the default local preference value applied to all updates coming from external neighbors or originating locally.

6. The metric of EIGRP is compatible with the metric of the earlier Interior Gateway Routing Protocol (IGRP). How do you convert the IGRP metric to the form of EIGRP?
Misconfigured neighbor statement - Unicast non-functional in NBMA environment
Multiply the IGRP metric by 256.
A Priority value of 0 is configured on all routers.
The only LSA flooded into the area is a single Type 3 default LSA.

7. What IP protocol number is used by Open Shortest Path First (OSPF)?
The O indicates the route is an OSPF intra-area route. The network destination is within the same area as the router on which this command is issued.
The default cost of the default route is 1.
Updates are sent to the DR.
OSPF uses IP protocol number 89.

8. You need to apply a route map to updates that are received from a BGP neighbor. What is the command you use to configure this?
BGP speakers
No DR/BDR election exists in a point-to-point environment by default.
External BGP is a BGP peering relationship between routers in different autonomous systems.
Router(config-router)# neighbor ip-address route-map name in

9. What is the default Hello interval for OSPF in a LAN?
10 seconds is the default Hello interval and the default Dead interval is 4 times that value.
The Network Summary (Type 3) LSA is sent into an area to advertise destinations outside the area. These LSAs are originated by Area Border Routers (ABRs). They flood throughout the autonomous system.
Router# clear ip bgp ip-address soft out
Interior Gateway Protocol(IGP)

10. What is the correct syntax to find community attributes in routing updates?
Type 7 LSAs are special external routes that you permit in a Not-So-Stubby area.
Link flapping - Network type being broadcast - PPP host route being redistributed - One router being not demand-circuit capable
200
Router(config)# ip community-list 1-99 permit|deny value [ value ... ]

11. What is the Feasible Distance (FD) value in EIGRP?
The neighbor command can be used to manually configure a neighbor in a NBMA OSPF environment. The full syntax of the command is: - Router(config-router)# neighbor ip-address [priority number] [poll-interval seconds] [cost number] [database-filter all
Lowest cost route calculated by adding the cost between the next hop router and the destination (AD) and the cost between the local router and the next hop. This sum is referred to as the FD.
Router# clear ip bgp ip-address soft out
The ASBR Summary (Type 4) LSA advertises an Autonomous System Boundary Router (ASBR) destination. This LSA is originated at an ABR. This LSA type is flooded throughout an autonomous system.

12. What are the three possible origin codes as specified by the origin attribute?
Packets that require acknowledgement are as follows: Update - Query - Reply
IGP - Exterior Gateway Protocol (EGP) - Unknown
Use the Router(config-if)# ip ospf cost value command to override the cost value that is calculated for a particular interface.
For the Broadcast Cisco mode of operation: Dynamic or manual neighbor configuration? Dynamic - DR/BDR election required? DR/BDR election

13. How can you temporarily disable a BGP neighborship?
Router(config-router)# neighbor ip-address shutdown
A site that has two connections to the same ISP - either from one router or two routers. One might be primary and the other backup - or the site might load balance over both links. Either static or dynamic routing would work in this case.
The next step in the update process features the DR acknowledging the LSU and flooding it to all OSPF speakers using multicast 224.0.0.5.
BGP speakers

14. Describe an autonomous system(AS).
Packets that require acknowledgement are as follows: Update - Query - Reply
An autonomous system is a group of networks under a common administration. The Internet Assigned Numbers Authority(IANA) assigns AS numbers: 1 to 64511 are public AS numbers and 64512 to 65535 are private AS numbers.
Use the variance command in EIGRP to control load balancing behavior[md]potentially across unequal bandwidth links.
The no-summary keyword needs to be used on the ABR only.

15. Name at least two standard filtering-oriented communities for use in BGP.
When a problem occurs that causes a router to end the BGP peering session - a notificationmessage is sent to the BGP neighbor and the connection is closed.
Route reflectors help address the fact that BGP requires that all BGP peers in the same autonomous system form an Internal BGP (IBGP) session with all peers in the autonomous system.
The BGP standards define several filtering-oriented communities for your use: no-export - Do not advertise routes to real External BGP (EBGP) peers - no-advertise - Do not advertise routes to any peer - local-as - Do not advertise routes to any EBGP
ADD - Adds a line to a prefix-list filter on the remote peer - DELETE - Removes a line from a filter that was previously installed on a remote peer - DELETE ALL - Removes all previously installed filters on the remote peer

16. How often are Hello packets sent on a multipoint circuit with bandwidth less than T1 in an EIGRP environment?
EIGRP uses up to 50 percent of the bandwidth (as set by the bandwidth command) for its operations.
For an OSPF router to advertise a default route into an area - the command default-information originate must be used. If the advertising router does not possess a default route in its routing table - you can use the always keyword to still generate
The correct command is show ip bgp.
Hellos are sent every 60 seconds on multipoint circuits with bandwidth less than T1.

17. You can reduce the flooding of LSAs in a stable network topology with what command?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

18. Describe a single-homed network.
The Network Summary (Type 3) LSA is sent into an area to advertise destinations outside the area. These LSAs are originated by Area Border Routers (ABRs). They flood throughout the autonomous system.
Three different administrative distance values are possible for OSPF[md]intra-area routes - inter-area routes - and external routes. By default all are set to 110.
A site with a single ISP connection.
EIGRP uses up to 50 percent of the bandwidth (as set by the bandwidth command) for its operations.

19. What technique can you use to ensure that a particular classless prefix is always advertised by a BGP-speaking router?
To reset the value - use the following command on each router: Router(config-router)# auto-cost reference-bandwidth refbw
Place a static route pointing to NULL0 in the IP routing table.
10 seconds is the default Hello interval and the default Dead interval is 4 times that value.
Cisco routers prefer a higher weight value.

20. What are the actions used by an Outbound Route Filter (ORF) type of Network Layer Reachability Information (NLRI)-based filtering (type 1)?
BGP peers exchange keepalive messages every 60 seconds by default. These keep the peering session active.
ADD - Adds a line to a prefix-list filter on the remote peer - DELETE - Removes a line from a filter that was previously installed on a remote peer - DELETE ALL - Removes all previously installed filters on the remote peer
An autonomous system is a group of networks under a common administration. The Internet Assigned Numbers Authority(IANA) assigns AS numbers: 1 to 64511 are public AS numbers and 64512 to 65535 are private AS numbers.
Use the following command to configure inter-area route summarization on the ABR: Router(config-router)# area area-id range address mask

21. The four types of BGP messages.
Router(config-router)# neighbor ip-address send-community
IBGP is a BGP peering relationship between routers in the same autonomous system.
Open - Update - Keepalive - Notification
The router passes the community information on unchanged.

22. What is the default link-state advertisement (LSA) aging timer?
The AS External (Type 5) LSAs advertise an external destination or a default route to an external destination. These LSAs are originated by ASBRs. They are flooded throughout the autonomous system.
The default LSA aging timer is 30 minutes.
The next hop router for a backup path is called the feasible successor.
For the Broadcast Cisco mode of operation: Dynamic or manual neighbor configuration? Dynamic - DR/BDR election required? DR/BDR election

23. You want to propagate a default route to other EIGRP speakers in the autonomous system. What command do you used to accomplish this?
The next step in the update process features the DR acknowledging the LSU and flooding it to all OSPF speakers using multicast 224.0.0.5.
Updates are sent to the DR.
Using the default-network command - you can configure a default route for the EIGRP process so that it propagates to other EIGRP routers within the same autonomous system.
Border Gateway Protocol

24. What is the term for routers running BGP?
EIGRP uses the multicast IP address of 224.0.0.10 for Hellos and routing updates.
BGP speakers
Confederations are another method of solving the IBGP full mesh requirement. Confederations are smaller sub-autonomous systems created within the primary autonomous system to decrease the number of BGP peer connections.
The BGP process injects local routes in two different ways[md]1) using the network configuration commands and 2) using redistribution by another routing protocol.

25. What is the administrative distance for EBGP?
The next route selection criteria is for the router to prefer the highest weight (local to router).
The Network Summary (Type 3) LSA is sent into an area to advertise destinations outside the area. These LSAs are originated by Area Border Routers (ABRs). They flood throughout the autonomous system.
BGP is a path-vector protocol
20

26. You are examining the results of the show ip route command - and you notice several OSPF routes bear an O route designator. What does this signify?
Using the default-network command - you can configure a default route for the EIGRP process so that it propagates to other EIGRP routers within the same autonomous system.
During the OSPF adjacency process - the Exchange State follows the Exstart State.
The O indicates the route is an OSPF intra-area route. The network destination is within the same area as the router on which this command is issued.
On-demand circuit is an enhancement that allows efficient operations over dialup - ISDN - and other on-demand circuits.

27. For the Point-to-point Cisco mode of operation - fill in the following information: Dynamic or manual neighbor configuration? ________ DR/BDR election required?
EIGRP uses the multicast IP address of 224.0.0.10 for Hellos and routing updates.
For the Point-to-point Cisco mode of operation: Dynamic or manual neighbor configuration? Dynamic DR/BDR election required? Not required
Default routes from each provider - default routes plus some more specific routes - and all routes from all providers. Either use static routes - or advertise the site routes to the ISP and receive a default route from the ISP.
During the OSPF adjacency process - the Exchange State follows the Exstart State.

28. What are two possible causes for an ABR not to advertise a summary route?
The default value of the MED attribute is 0.
An ABR might not advertise a summary route for the following reasons:
Router(config-router)# neighbor ip-address route-reflector-client
External BGP is a BGP peering relationship between routers in different autonomous systems.

29. How do you ensure the router ID is changed on a device following the use of the router-id command?
Aggregator - Community
An autonomous system is a group of networks under a common administration. The Internet Assigned Numbers Authority(IANA) assigns AS numbers: 1 to 64511 are public AS numbers and 64512 to 65535 are private AS numbers.
Once using the command - you use the clear ip ospf process to reset the OSPF process and change the router ID.
When a problem occurs that causes a router to end the BGP peering session - a notificationmessage is sent to the BGP neighbor and the connection is closed.

30. When an EIGRP-speaking router receives Hello packets from a neighbor for the first time - How does the router respond if it has matching Hello parameters in the packet?
The router responds with an update of the routing information it possesses.
IGP - Exterior Gateway Protocol (EGP) - Unknown
Manually configured
The Database Description (DBD) packet type checks for database synchronization between routers.

31. Describe a transit AS.
Slow neighbors are sent unicast packets in an attempt to resolve issues with slow neighbors.
A transit AS is an AS through which traffic to another AS travels - such as with an ISP.
Changing the weight of a locally sourced route - Tagging source routes with BGP communities - Setting the local preference - Changing the value of the MED
Local preference can be used to enact global autonomous system routing policies.

32. Describe External BGP.
Use the following command to configure inter-area route summarization on the ABR: Router(config-router)# area area-id range address mask
Misconfigured neighbor statement - Unicast non-functional in NBMA environment
External BGP is a BGP peering relationship between routers in different autonomous systems.
When a problem occurs that causes a router to end the BGP peering session - a notificationmessage is sent to the BGP neighbor and the connection is closed.

33. You need to suppress the periodic Hellos so that an ISDN link is not constantly enabled in a dial-on-demand routing (DDR) environment. What feature of OSPF should you use?
External BGP is a BGP peering relationship between routers in different autonomous systems.
The command is applied on all routers in the area.
On-demand circuit is an enhancement that allows efficient operations over dialup - ISDN - and other on-demand circuits.
Origin - Next-hop - Weight - Community - Local preference - Multi Exit Discriminator (MED)

34. You have local BGP routing policies you can enact - and you have global autonomous system policies that you can implement. What is the purpose of local preference - local or global?
Local preference can be used to enact global autonomous system routing policies.
Interior Gateway Protocol(IGP)
BGP speakers
Route dampening can make the network more stable. To enable route dampening - use the bgp dampening command.

35. What is the type number of the external routes permitted in a Not-So-Stubby OSPF area?
The router responds with an update of the routing information it possesses.
Route reflectors help address the fact that BGP requires that all BGP peers in the same autonomous system form an Internal BGP (IBGP) session with all peers in the autonomous system.
Router(config-router)# neighbor {ip-address | peer-group-name} prefix-list prefix-listname {in | out}
Type 7 LSAs are special external routes that you permit in a Not-So-Stubby area.

36. You are utilizing the soft reconfiguration feature of Cisco IOS Release 12.x with BGP. You have completed the changes to filters and route maps that are applied on the outgoing information. What command should you execute?
The correct command is show ip bgp.
DROTHERs form an adjacency with the DR and BDR.
Router# clear ip bgp ip-address soft out
A site with two connections to multiple ISPs. This gives the most redundancy. BGP is used with the ISPs and can be used internally also.

37. Name three Mandatory Well-Known BGP attributes.
Origin - AS-Path - Next-Hop
These routes are Type-1 external routes. They define networks outside of the autonomous system and are advertised by Type 5 LSAs. The cost is calculated by adding the external cost to the internal cost of each link that the packet crosses. The use of
A list of networks known by BGP - along with their paths and attributes. To view it - use the show ip bgp command.
Router(config-router)# area area-id default-cost cost

38. What is the feasible successor in EIGRP?
Router(config-router)# neighbor ip-address route-reflector-client
The next hop router for a backup path is called the feasible successor.
Border Gateway Protocol
This network is currently unavailable and installation cannot occur in the routing table. The router is currently searching for a replacement route.

39. You can manipulate the administrative distance of three different types of OSPF routes. What are the three types?
The Cisco mode of Broadcast requires a full mesh topology.
Three different administrative distance values are possible for OSPF[md]intra-area routes - inter-area routes - and external routes. By default all are set to 110.
BGP peers
Router(config-router)# neighbor ip-address route-map name in

40. How many instances of BGP can be run on a single router?
The Cisco mode of Broadcast requires a full mesh topology.
Three different administrative distance values are possible for OSPF[md]intra-area routes - inter-area routes - and external routes. By default all are set to 110.
A site with a single ISP connection.
Only one instance of BGP can be run on a single router

41. Notification
A transit AS is an AS through which traffic to another AS travels - such as with an ISP.
After a neighbor is configured - BGP sends an open message to try to establish peering with that neighbor. Includes information such as autonomous system number - router ID - and hold time.
When a problem occurs that causes a router to end the BGP peering session - a notificationmessage is sent to the BGP neighbor and the connection is closed.
Use the bgp default local-preference command to change the default local preference value applied to all updates coming from external neighbors or originating locally.

42. Over which IP protocol does BGP communicate?
Message used to transfer routing information between peers. Includes new routes - withdrawn routes - and path attributes.
When a problem occurs that causes a router to end the BGP peering session - a notificationmessage is sent to the BGP neighbor and the connection is closed.
BGP communicates over TCP port 179
The Database Description (DBD) packet type checks for database synchronization between routers.

43. Update
Message used to transfer routing information between peers. Includes new routes - withdrawn routes - and path attributes.
The AS External (Type 5) LSAs advertise an external destination or a default route to an external destination. These LSAs are originated by ASBRs. They are flooded throughout the autonomous system.
Route reflectors help address the fact that BGP requires that all BGP peers in the same autonomous system form an Internal BGP (IBGP) session with all peers in the autonomous system.
Mismatched interface MTU - Duplicate router IDs on routers - Broken unicast connectivity - Network type of point-to-point between PRI and BRI/dialer

44. What does a Type 1 LSA describe and Where is this LSA flooded?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

45. You are examining the results of the show ip route command - and you notice several OSPF routes bear an O E2 route designator. What does this signify?
Router(config)# ip community-list 1-99 permit|deny value [ value ... ]
These are Type-2 external routes. Again - they define networks outside of the autonomous system and are advertised by Type 5 LSAs. In this case cost is always the external cost only. This is the default OSPF external route type on Cisco routers.
Route tagging with communities is always done with a route map. You can specify any number of communities. Communities specified in the set keyword overwrite existing communities unless you specify the additive option.
Router(config-router)# neighbor ip-address route-map name in

46. You are considering the use of the weight attribute to influence route selection. Is a higher or lower weight preferred by Cisco routers?
The only LSA flooded into the area is a single Type 3 default LSA.
OSPF addresses packets to multicast address 224.0.0.5.
Cisco routers prefer a higher weight value.
Manually configured

47. You have configured the demand-circuit configuration in your OSPF network - but the link keeps coming up because of OSPF. Name at least three possible reasons for this.
The correct command is show ip bgp.
Link flapping - Network type being broadcast - PPP host route being redistributed - One router being not demand-circuit capable
In EIGRP - a reliability of value 1 indicates a completely unreliable link.
Border Gateway Protocol

48. What kind of routing protocol is BGP?
During the OSPF adjacency process - the Exchange State follows the Exstart State.
OSPF not enabled properly on appropriate interfaces - Layer 1 or 2 not functional - Passive interface configured - Access list(s) blocking Hello packets in multiple directions - Error in IP address or subnet mask configuration - Hello or Dead interva
BGP is a path-vector protocol
Place a static route pointing to NULL0 in the IP routing table.

49. The metric of EIGRP contains a reliability component. What is the value that indicates a completely unreliable link?
BGP peers
In EIGRP - a reliability of value 1 indicates a completely unreliable link.
The only LSA flooded into the area is a single Type 3 default LSA.
A Priority value of 0 is configured on all routers.

50. You are considering manipulating the K values on an EIGRP router. Which routers in the EIGRP domain must have this configuration made?
The command is applied on all routers in the area.
[AS-number]:[low-order-16-bits]
BGP is a path-vector protocol
You must manipulate the K values on all routers if you plan to manipulate them on one.