SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
Test your basic knowledge |
CCNP Route
Start Test
Study First
Subjects
:
cisco
,
it-skills
,
ccnp
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. For the nonbroadcast (NBMA) RFC-compliant mode of operation - fill in the following information: Dynamic or manual neighbor configuration? ________ DR/BDR election required?
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.
10 seconds is the default Hello interval and the default Dead interval is 4 times that value.
For the Point-to-point Cisco mode of operation: Dynamic or manual neighbor configuration? Dynamic DR/BDR election required? Not required
For the nonbroadcast (NBMA) RFC-compliant mode of operation: Dynamic or manual neighbor configuration? Manual - DR/BDR election required? DR/BDR election
2. You are considering the use of the weight attribute to influence route selection. Is a higher or lower weight preferred by Cisco routers?
Place a static route pointing to NULL0 in the IP routing table.
External BGP is a BGP peering relationship between routers in different autonomous systems.
Mismatched MTU - Corrupted link-state request packet
Cisco routers prefer a higher weight value.
3. What command do you use to configure route summarization on an ASBR to summarize external routes?
Use the following command to configure inter-area route summarization on the ABR: Router(config-router)# area area-id range address mask
Use the following command to configure route summarization on an ASBR to summarize external routes: Router(config-router)# summary-address address mask [not-advertise] [tag tag]
20
The router responds with an update of the routing information it possesses.
4. 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
5. Open
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
Border Gateway Protocol
You use the following command to configure an area as Totally Stubby: Router(config-router)# area area-id stub no-summary
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.
6. What is the default value of the MED attribute?
For the nonbroadcast (NBMA) RFC-compliant mode of operation: Dynamic or manual neighbor configuration? Manual - DR/BDR election required? DR/BDR election
The no-summary keyword needs to be used on the ABR only.
Router# clear ip bgp ip-address in
The default value of the MED attribute is 0.
7. What does a Type 2 LSA describe - what router produces it - and Where is it flooded?
You must manipulate the K values on all routers if you plan to manipulate them on one.
The Network LSA (Type 2) lists all attached routers. These LSAs are produced by the DR on every multi-access network. They are flooded within the originating area.
Once using the command - you use the clear ip ospf process to reset the OSPF process and change the router ID.
Manually configured
8. Name at least one reason why an OSPF neighbor might be stuck in the LOADING state.
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.
Mismatched MTU - Corrupted link-state request packet
Multiply the IGRP metric by 256.
Router(config)# ip community-list 1-99 permit|deny value [ value ... ]
9. What is the term for routing between Autonomous Systems?
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
Once using the command - you use the clear ip ospf process to reset the OSPF process and change the router ID.
The default value of the MED attribute is 0.
Interdomain routing
10. What is the correct command to configure a Not-So-Stubby Area in OSPF?
[AS-number]:[low-order-16-bits]
Manually configured
The correct command to configure a Not-So-Stubby Area in OSPF is as follows: Router(config-router)# area area-id nssa [no-redistribution] [default-information-originate]
The NSSA External (Type 7) LSA is almost identical to a Type 5 AS External LSA - yet it is used to create Not-So-Stubby Areas. An NSSA ASBR generates this LSA - and an NSSA ABR translates it into a Type 5 LSA - which gets propagated into the OSPF dom
11. Describe BGP loop prevention.
Warning
: Invalid argument supplied for foreach() in
/var/www/html/basicversity.com/show_quiz.php
on line
183
12. What is the command that you use to configure an area as Totally Stubby?
You must manipulate the K values on all routers if you plan to manipulate them on one.
Slow neighbors are sent unicast packets in an attempt to resolve issues with slow neighbors.
You use the following command to configure an area as Totally Stubby: Router(config-router)# area area-id stub no-summary
BGP peers exchange keepalive messages every 60 seconds by default. These keep the peering session active.
13. What are the two methods by which BGP injects local routes into the BGP table?
Using the default-metric command in BGP configuration mode causes all redistributed networks to have the specified MED value.
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.
Type 7 LSAs are special external routes that you permit in a Not-So-Stubby area.
You can use the show ip ospf command to verify the router ID of an OSPF-speaking router.
14. Describe Internal BGP.
Hellos are sent every 5 seconds on broadcast links - as well as p2p serial - p2p subinterface - and multipoint circuits greater than T1.
You can configure manual manipulation of the AS-path attribute with the set as-path prepend command.
String matching ranges and wildcards - brackets '[]' can be used for ranges - and the '.' can match any single character.
IBGP is a BGP peering relationship between routers in the same autonomous system.
15. 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?
This network is currently unavailable and installation cannot occur in the routing table. The router is currently searching for a replacement route.
Interior Gateway Protocol(IGP)
Cisco's implementation of OSPF calculates the metric using the following formula: - cost = refbw/bandwidth - The default refbw is 100 Mbps.
On-demand circuit is an enhancement that allows efficient operations over dialup - ISDN - and other on-demand circuits.
16. You need to send a route refresh message to a specific BGP-speaking neighbor. What is the correct command syntax to do so?
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.
Router# clear ip bgp ip-address in
Cisco's implementation of OSPF calculates the metric using the following formula: - cost = refbw/bandwidth - The default refbw is 100 Mbps.
200
17. What does a Type 5 LSA describe - what router produces it - and Where is it flooded by default?
To display routes matching the AS-path regular expression - use the show ip bgp regexp command.
Once using the command - you use the clear ip ospf process to reset the OSPF process and change the router ID.
The Network LSA (Type 2) lists all attached routers. These LSAs are produced by the DR on every multi-access network. They are flooded within the originating area.
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.
18. What is the correct syntax to find community attributes in routing updates?
To qualify as a feasible successor - a next hop router must have an AD less than the FD of the current successor route. More than one feasible successor can exist.
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.
Use the following command to configure inter-area route summarization on the ABR: Router(config-router)# area area-id range address mask
Router(config)# ip community-list 1-99 permit|deny value [ value ... ]
19. What OSPF-related command allows you to reset the refbw value used in the formula for OSPF cost calculation?
Using the default-metric command in BGP configuration mode causes all redistributed networks to have the specified MED value.
200
To reset the value - use the following command on each router: Router(config-router)# auto-cost reference-bandwidth refbw
Router(config-router)# area area-id default-cost cost
20. You need to configure BGP community propagation for a large number of BGP neighbors. What is the ideal mechanism to use to assist with this configuration?
Router(config-router)# neighbor ip-address send-community
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.
BGP peer groups would be ideal for this situation.
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
21. Describe an autonomous system(AS).
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.
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.
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.
A site connected to more than one ISP at the same time. It is done for redundancy and backup if one ISP fails - and for better performance if one ISP provides a better path to frequently used networks. This also gives you an ISP-independent solution.
22. You have a hub and spoke topology - and you are using EIGRP as your IGP. You want only routes that you specify propagated from the spoke of your topology. What EIGRP feature allows you to configure this?
Hellos are sent every 5 seconds on broadcast links - as well as p2p serial - p2p subinterface - and multipoint circuits greater than T1.
Interior Gateway Protocol(IGP)
Use the variance command in EIGRP to control load balancing behavior[md]potentially across unequal bandwidth links.
EIGRP stub routing is a feature that allows you to specify the routes that are propagated from the spoke.
23. In a LAN - to which router(s) does a DROTHER send an update?
The minimum metric of the specific routes is used as the metric of the summary route.
Updates are sent to the DR.
You can configure manual manipulation of the AS-path attribute with the set as-path prepend command.
This regular expression matches routes that originated in autonomous system 200.
24. Name a Nontransitive BGP attribute.
OSPF addresses packets to multicast address 224.0.0.5.
The next route selection criteria is for the router to prefer the highest weight (local to router).
Message used to transfer routing information between peers. Includes new routes - withdrawn routes - and path attributes.
Multi Exit Discriminator.
25. You want to improve the troubleshooting capabilities of your administration of an OSPF network. You plan to do this by making sure you can ping each router ID of each router. How can you accomplish this?
20
A Priority value of 0 is configured on all routers.
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.
To ensure that the router ID can be pinged - be sure to advertise the address using the appropriate network command.
26. For the Broadcast Cisco mode of operation - fill in the following information: Dynamic or manual neighbor configuration? ________ - DR/BDR election required? ________
For the Broadcast Cisco mode of operation: Dynamic or manual neighbor configuration? Dynamic - DR/BDR election required? DR/BDR election
String matching ranges and wildcards - brackets '[]' can be used for ranges - and the '.' can match any single character.
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.
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.
27. For the Point-to-multipoint nonbroadcast Cisco mode of operation - fill in the following information: Dynamic or manual neighbor configuration? ________ DR/BDR election required? ________
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.
For the Point-to-multipoint nonbroadcast Cisco mode of operation: Dynamic or manual neighbor configuration? Manual - DR/BDR election required? Not required
The only LSA flooded into the area is a single Type 3 default LSA.
Hellos are sent every 5 seconds on broadcast links - as well as p2p serial - p2p subinterface - and multipoint circuits greater than T1.
28. What is the effect of the network backdoor command in BGP?
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.
Changing the weight of a locally sourced route - Tagging source routes with BGP communities - Setting the local preference - Changing the value of the MED
For the Point-to-multipoint RFC-compliant mode of operation: Dynamic or manual neighbor configuration? Dynamic DR/BDR election required? Not required
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.
29. What are the packets in an EIGRP environment that require an acknowledgement?
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.
IGP - Exterior Gateway Protocol (EGP) - Unknown
Packets that require acknowledgement are as follows: Update - Query - Reply
Use the variance command in EIGRP to control load balancing behavior[md]potentially across unequal bandwidth links.
30. When an area is configured as Totally Stubby - what LSAs are flooded into the area?
The only LSA flooded into the area is a single Type 3 default LSA.
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.
BGP's loop prevention mechanism is an autonomous system number. When an update about a network leaves an autonomous system - that autonomous system's number is prepended to the list of autonomous systems that have handled that update. When an autonom
To ensure that the router ID can be pinged - be sure to advertise the address using the appropriate network command.
31. 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?
The minimum metric of the specific routes is used as the metric of the summary route.
Router(config-router)# neighbor ip-address route-map name in
For the nonbroadcast (NBMA) RFC-compliant mode of operation: Dynamic or manual neighbor configuration? Manual - DR/BDR election required? DR/BDR election
Router(config-router)# neighbor ip-address shutdown
32. 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
33. What is the IP protocol number used by Enhanced Interior Gateway Routing Protocol (EIGRP)?
EIGRP uses the multicast IP address of 224.0.0.10 for Hellos and routing updates.
EIGRP uses IP protocol number 88.
A transit AS is an AS through which traffic to another AS travels - such as with an ISP.
BGP peer groups would be ideal for this situation.
34. What key design requirement of BGP does a BGP route reflector address?
BGP's loop prevention mechanism is an autonomous system number. When an update about a network leaves an autonomous system - that autonomous system's number is prepended to the list of autonomous systems that have handled that update. When an autonom
A virtual link is a link to the backbone through a non-backbone area. Virtual links are created between two ABRs - and the area cannot be stub.
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.
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.
35. To what IP address does OSPF send packets destined for the Designated Router (DR) and Backup Designated Router (BDR) in the LAN?
These route types are OSPF inter-area routes. They define networks outside of the area of the router - but within the autonomous system. Type 3 LSAs are used to advertise these route types.
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.
OSPF addresses packets to multicast address 224.0.0.6.
External BGP is a BGP peering relationship between routers in different autonomous systems.
36. When a BGP router receives an update from an EBGP neighbor - it must pass that update to its IBGP neighbors without changing the next-hop attribute. Therefore - IBGP routers must have a route to the network connecting their autonomous system to that
Use the neighbor [ip address] next-hop-self command in BGP configuration mode.
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.
The router passes the community information on unchanged.
Hellos are sent every 5 seconds on broadcast links - as well as p2p serial - p2p subinterface - and multipoint circuits greater than T1.
37. Over which IP protocol does BGP communicate?
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.
You use the following command to configure an area as Totally Stubby: Router(config-router)# area area-id stub no-summary
Use the Router(config-if)# ip ospf cost value command to override the cost value that is calculated for a particular interface.
BGP communicates over TCP port 179
38. 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.
Use the neighbor [ip address] next-hop-self command in BGP configuration mode.
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 no-summary keyword needs to be used on the ABR only.
39. Are BGP neighbors manually configured or automatically discovered?
For the Broadcast Cisco mode of operation: Dynamic or manual neighbor configuration? Dynamic - DR/BDR election required? DR/BDR election
Slow neighbors are sent unicast packets in an attempt to resolve issues with slow neighbors.
Hellos are sent every 5 seconds on broadcast links - as well as p2p serial - p2p subinterface - and multipoint circuits greater than T1.
Manually configured
40. What are the actions used by an Outbound Route Filter (ORF) type of Network Layer Reachability Information (NLRI)-based filtering (type 1)?
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
These route types are OSPF inter-area routes. They define networks outside of the area of the router - but within the autonomous system. Type 3 LSAs are used to advertise these route types.
Router(config-router)# neighbor ip-address shutdown
OSPF addresses packets to multicast address 224.0.0.6.
41. You are considering the use of route maps in BGP for filtering purposes. Name at least five options for match clause criteria.
To ensure that the router ID can be pinged - be sure to advertise the address using the appropriate network command.
IP network numbers and subnet masks (prefix-list or access-list) - Route originator - Next hop - Origin code - Tag value attached to an Interior Gateway Protocol (IGP) route - AS-path - Community - IGP route type
Aggregator - Community
Use the neighbor [ip address] next-hop-self command in BGP configuration mode.
42. Given the fact that the BGP route selection process begins by excluding any route with an inaccessible next hop - What is the next route selection criteria that is used?
Router(config-router)# neighbor ip-address send-community
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.
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 next route selection criteria is for the router to prefer the highest weight (local to router).
43. What is the multicast address used by EIGRP for the sending of Hellos and routing updates?
EIGRP uses the multicast IP address of 224.0.0.10 for Hellos and routing updates.
Router(config-router)# neighbor ip-address shutdown
The Type 7 LSA is translated into a Type 5 LSA by the ABR.
The next hop router for a backup path is called the feasible successor.
44. To what IP address does OSPF send packets destined for all OSPF routers in the LAN?
Cisco's implementation of OSPF calculates the metric using the following formula: - cost = refbw/bandwidth - The default refbw is 100 Mbps.
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
Using the default-metric command in BGP configuration mode causes all redistributed networks to have the specified MED value.
OSPF addresses packets to multicast address 224.0.0.5.
45. What is the command to change the cost of the default route used within a Totally Stubby area?
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.
Open - Update - Keepalive - Notification
Router(config-router)# area area-id default-cost cost
Router(config)# ip community-list 1-99 permit|deny value [ value ... ]
46. What is the correct command to view the BGP table on the local router?
Link flapping - Network type being broadcast - PPP host route being redistributed - One router being not demand-circuit capable
The correct command is show ip bgp.
BGP peers
The NSSA External (Type 7) LSA is almost identical to a Type 5 AS External LSA - yet it is used to create Not-So-Stubby Areas. An NSSA ASBR generates this LSA - and an NSSA ABR translates it into a Type 5 LSA - which gets propagated into the OSPF dom
47. Describe External BGP.
External BGP is a BGP peering relationship between routers in different autonomous systems.
Local Preference - Atomic Aggregate
Updates are sent to the DR.
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
48. Routing table
The Cisco mode of Broadcast requires a full mesh topology.
EIGRP uses IP protocol number 88.
BGP peers exchange keepalive messages every 60 seconds by default. These keep the peering session active.
A list of paths to each network used by the router - and the next hop for each network. To view it - use the show ip route command.
49. How can you change the amount of bandwidth that EIGRP consumes on an interface?
An ABR might not advertise a summary route for the following reasons:
This percentage can be changed on a per-interface basis by using the ip bandwidth-percent eigrp interface configuration command.
Use the following command to configure inter-area route summarization on the ABR: Router(config-router)# area area-id range address mask
Multi Exit Discriminator.
50. What does a Type 7 LSA describe - what router produces it - and Where is it flooded by default?
The NSSA External (Type 7) LSA is almost identical to a Type 5 AS External LSA - yet it is used to create Not-So-Stubby Areas. An NSSA ASBR generates this LSA - and an NSSA ABR translates it into a Type 5 LSA - which gets propagated into the OSPF dom
During the OSPF adjacency process - the Exchange State follows the Exstart State.
The correct command to configure a Not-So-Stubby Area in OSPF is as follows: Router(config-router)# area area-id nssa [no-redistribution] [default-information-originate]
Router(config-router)# neighbor ip-address send-community