EMT Practice Test

1. Question Content...

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Question1: A router receives two routes from its neighbors: a route from OSPF for 10.0.0.0/24, and a route from BGP for 10.0.0.0/8. Both routes have reachable next hops. Which of the following is TRUE?

Question2: Click the exhibit.

An update travels from AS 137000 to AS 135000, traversing both 32-bit and 16-bit AS Paths.
What AS Path is seen by AS 200?

Question3: Click the exhibit.

Routers RR1 and RR2 are route reflectors with the same Cluster-ID. When the update for prefix
192.168.1.0/27 is received at router RA2, what are the Originator_ID and Cluster_List attributes?

Question4: Click the exhibit.

Given that ISP 1 and ISP 2 are Tier 2 providers, and that ISP 3 and ISP 4 are Tier 1 providers, what is the most likely relationship between ISP 1 and the other ISPs?

Question5: Click the exhibit.

Which of the following can be used by router R4 in AS 65542 to reject all routes originating in AS 65540?

Question6: Click the exhibit.

Assuming the network is IPv6 only, which of the following configurations on the Alcatel-Lucent
7750 SR router A can establish an IPv6 BGP session to router B?

Question7: Which regular expression will match the AS Path of a route originating in remote AS 65100?

Question8: Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP policy?

Question9: What happens to a route that is rejected by an import policy on an Alcatel-Lucent 7750 SR?

Question10: Which of the following is TRUE if a BGP session state is Connect?

Question11: Click the exhibit.
AS 65540 routers are iBGP fully-meshed. Prefixes advertised by router R2 have a local preference of 200.
Router R1 advertises the prefix 192.168.1.0/27 to routers R2 and R3. Assuming that router R3 is configured with "advertise-external", what is the expected output of "show router bgp routes" when executed on router R4?

Question12: Click the exhibit.

AS 65540 routers are iBGP fully-meshed. Assume routers R4, R5 and R6 are configured with addpaths ipv4 send 2 receive". Which routes to 192.168.0.1/27 is router R6 expected to have in its BGP routing table?

Question13: Which of the following regarding route reflectors is TRUE?

Question14: Which of the following statements regarding Internet Exchange Points is FALSE?

Question15: A router in AS 65100 receives three routes for 138.120.0.0/16. The first route has an AS Path of 65200
65400 65300 and a local preference of 150. The second route has an AS Path of 65200 65300 and a local preference of 100. The third route has an AS path of 65600 65300 and a local preference of 200. Which route will appear in the RIB-In?

Question16: Which of the following regarding the TTL of a BGP message is TRUE?

Question17: A router in AS 65100 receives two BGP routes. The first route is for 138.1.1.0/24 with an AS Path of 65200
65300, Local Preference of 100, MED of 100, and router ID 10.10.10.10. The second route is for
138.1.0.0/16 with an AS Path of 65500 65300, Local Preference of 150, MED of 100, and router ID
10.1.1.1. Assuming all other attributes are equal, which route would be used to forward an IP packet with destination IP address 138.1.1.1?

Question18: An Alcatel-Lucent 7750 SR is configured with an export policy to redistribute its directly-connected networks into BGP. Which of the following databases contains the routes for these networks?

Question19: Click the exhibit.

Router R6 is a route reflector with clients R1, R2, R4 and R5. R4 receives three routes from router R6 and is configured with ECMP 3. Given the following BGP configuration on router R4, how many primary and backup paths will be present in router R4's BGP routing table?

Question20: Which of the following is considered a best practice for BGP address planning?

Question21: The following policies are configured and exported using "export "Policy-1" "Policy-2"". Assuming both
"Client-1" and "Client-2" are properly defined on the router, which routes are advertised?

Question22: Click the exhibit.

Routers RR1 are RR2 are redundant route reflectors for clients R3 and R4. Which of the following is a valid configuration on router RR1?

Question23: Click the exhibit.

Router R1 is advertising prefix 192.168.1.0/27 with community "no-export. Which routers will receive an update for that prefix?

Question24: Which of the following AS Paths will match the regular expression "65100."?

Question25: Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.
Assuming that none of the routers in AS 65540 is configured with "advertise-external", what is the expected output of "show router bgp routes" on router R2?

Question26: What is the default Alcatel-Lucent 7750 SR TTL of a BGP advertisement between confederation members?

Question27: The configuration of an Alcatel-Lucent 7750 SR is given below. Router Rl has established BGP sessions with routers R2 and R3. Which of the following is TRUE?

Question28: Click the exhibit.

Routers C and E are route reflectors. When the update for prefix 192.168.2.0/24 is received at router F, what will be the Originator_ID attribute?

Question29: Click the exhibit.

Assuming that none of the routers within AS 65200 is configured with next-hop-self", what will the BGP update for the 192.168.0.1/27 prefix contain when it arrives at router B?

Question30: An autonomous system has 7 routers configured with BGP. How many iBGP sessions are required for a fully meshed configuration?

Question31: Which of the following prefix-lists is the most specific match for prefixes 192.168.64.1/20 and
192.168.32.5/19?

Question32: Which of the following prefix-lists is the most specific match for prefix 172.31.2.1/24?

Question33: BGP is configured on two peers, routers A and B.
Router A is configured with a Hold Time timer of 60 seconds and a Keepalive timer of 25 seconds. Router B is configured with a Hold Time timer of 90 seconds and a Keepalive timer of 70 seconds. What will the active Keepalive timer be on router B?

Question34: Click the exhibit.

Which of the following is a valid confederation configuration for Router R2?

Question35: Click the exhibit.

Router R2 receives a route to 192.168.4.0/29 from router R4 and sets the local preference to 110.
Router R1 receives the route to 192.168.4.0/29 from router R3, and sets the local preference to
80. There is a full iBGP mesh in AS 65540, but router R5 only has a physical connection to router R1.
Which path does traffic destined to 192.168.4.0/29 take from router R5?

Question36: Click the exhibit.

If router A originates an update for prefix 192.168.0.1/27, what will the update contain when it reaches router B?

Question37: Click the exhibit.

AS 65550 owns CIDR block 10.64.0.0/12. Router R6 advertises the aggregate 10.64.0.0/12 to AS 65541 with "as-set" enabled. Which of the following is TRUE regarding the aggregate route received by router R7?

Question38: Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

Question39: Which of the following regarding BGP authentication on the Alcatel-Lucent 7750 SR is FALSE?

Question40: From what range are 16-bit private AS numbers selected?

Question41: Click the exhibit.

An update travels from AS 135000 to AS 137000, traversing both 32-bit and 16-bit AS paths.
What will the AS Path be when the update reaches AS 137000?

Question42: Click the exhibit.

Assume all router-IDs are properly configured, and global IPv6 addresses are used to establish eBGP sessions. Which of the following configurations is required on router A so that router B can exchange traffic with router D?

Question43: Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

Question44: Upon the successful establishment of a TCP session between peers, what type of BGP message is exchanged?

Question45: Click the exhibit.

When router A receives the BGP update for the 192.168.0.1/27 prefix, it propagates it to routers B and C.
What action is taken by router B when it receives the update?

Question46: A router in AS 65100 receives three routes for 138.120.0.0/16. The first route has an AS Path of 65200
65400 65300 and a local preference of 150. The second route has an AS Path of 65200 65300 and a local preference of 100. The third route has an AS Path of 65600 65300 and a local preference of 100. Which route will appear in the RIB-out?

Question47: Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.
Assuming that none of the routers in AS 65540 is configured with "advertise-external", what is the expected output of "show router bgp routes on router R1?

Question48: When implementing a BGP policy on an Alcatel-Lucent 7750 SR, which of the following types of address space would a typical address plan need to cover?

Question49: What kind of attribute is the aggregator?

Question50: Click the exhibit.

Given the following configuration for router R1, what is the expected Next Hop for prefix 192.168.1.0/27 as seen on router R2?

Question51: Click on the exhibit.

AS 65540 is using MPLS to provide BGP shortcuts for its iBGP routing. Which routers must be configured with the "configure router bgp igp-shortcuts rsvp-te" command?

Question52: Which of the following is TRUE if the local state of BGP is OpenConfirm?

Question53: Consider two Alcatel-Lucent 7750 SRs in AS 65540. Router R1 has system address 10.10.10.1, and router R2 has system address 10.10.10.2. Which of the following configurations on router R2 can establish a BGP session with router R1?

Question54: Which of the following is TRUE?

Question55: When an Alcatel-Lucent 7750 SR receives a BGP route with an AS Path loop, what action is taken by default?

Question56: Which of the following regarding the atomic aggregate attribute is TRUE?

Question57: Which of the following statements regarding BGP shortcuts is FALSE?

Question58: Click the exhibit.

AS 65100 is advertising 192.168.1.0/27 into BGP. Which of the following AS Paths would the prefix
192.168.1.0/27 contain when viewed on router R8?

Question59: Click the exhibit.

Router R3 is configured with an import policy to reject updates with an AS Path matching the regular expression ".+ 65540". Which of the following regarding updates originating in AS 65540 is TRUE?

Question60: Click the exhibit.

Which of the following statements best describes the BGP sessions within the given network?

Question61: Click the exhibit.

AS 65100 is advertising 192.168.1.0/27 into BGP. Which of the following AS Paths would the prefix
192.168.1.0/27 contain when viewed on router R7?

Question62: Which of the following describes BGP route processing on the Alcatel-Lucent 7750 SR?

Question63: Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.
Assuming that router R6 is configured with "advertise-external", what is the expected output of "show router bgp routes" when executed on router R5?

Question64: Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.
Assuming that router R6 is configured with "advertise-external", what is the expected output of "show router bgp routes" when executed on router R1?

Question65: Click on the exhibit.

AS 65540 is using MPLS to provide BGP shortcuts for its iBGP routing. AS 65541 is advertising prefix
192.168.1.0/27 into BGP. Which routers have the BGP update for the advertised prefix in their BGP table?

Question66: Click the exhibit.

AS 65550 owns CIDR block 10.64.0.0/12. Router R3 is advertising Client1 and Client2 networks into BGP.
Router R6 advertises the aggregate 10.64.0.0/12 to AS 65541 with "summary-only" enabled. Which of the following routes are received by router R7?

Question67: Click the exhibit.

If router A originates a BGP route for prefix 192.168.0.1/27, what will the update contain when it reaches router B?

Question68: Which of the following prefix lists include prefixes 192.168.128.0/17 and 192.168.64.0/18?

Question69: Click the exhibit.

Assume all router-IDs are properly configured, and link-local IPv6 addresses are used to establish the eBGP sessions. Which of the following is the MINIMAL configuration required on router A so that router B can exchange traffic with router D?

Question70: An Alcatel-Lucent 7750 SR receives a route from an iBGP peer with a MED value of 500. What MED value is sent to eBGP peers?

Question71: Click the exhibit.

Routers RR1 are RR2 are redundant route reflectors for clients R3 and R4. Which of the following is a valid configuration on router R3?

Question72: How is the aggregator attribute handled with 32-bit AS numbers?

Question73: Click the exhibit.

Routers RR1 and RR2 are route reflectors with the same Cluster-ID. How does router RA treat the updates for prefix 192.168.1.0/27 received from routers RR1 and RR2?

Question74: Which of the following statements regarding the Internet is FALSE?

Question75: Click the exhibit.

Router R6 is a route reflector with clients R1, R2 and R5. Router R3 advertises the prefix 192.168.1.0/27 to routers R1, R2 and R5. How many routes for prefix 192.168.1.0/27 will router R6 receive?

Question76: Click the exhibit.

Routers RR1 and RR2 are route reflectors with the same cluster-ID. How many updates for prefix
192.168.1.0/27 are received at router RR1?

Question77: Which of the following is NOT a goal of BGP routing policies?

Question78: What is the function of the Cluster_List attribute?

Question79: How are policy direction and data flow related on the Alcatel-Lucent 7750 SR?

Question80: Click the exhibit.

Assuming a full iBGP mesh in ISP 1, how does router R1 in ISP 1 handle a BGP update received from ISP
2?

Question81: What will happen if an update is received with an unrecognized optional non-transitive attribute?

Question82: Which of the following statements regarding BGP Fast Reroute is FALSE?

Question83: Which of the following organizations would an ISP based in Europe approach for an IP prefix assignment?

Question84: Which of the following statements regarding BGP FRR is FALSE?

Question85: What class of attribute is Originator_ID?

Question86: Click the exhibit.

Assume all router-IDs are properly configured, and IPv6 link-local addresses are used to establish all eBGP sessions. Given the following iBGP configuration on router A, what is the Next Hop for prefix
2001:DB8:A:401::1/128 on router B?

Question87: Which of the following about a single-homed AS is FALSE?

Question88: What kind of BGP attribute is the Local Preference?

Question89: Click the exhibit.

Router R2 receives a route to 192.168.1.0/27 from router R4, and sets the local preference to 110. Router R1 receives a route to 192.168.1.0/27 from router R3, and sets the local preference to 80. Both ASs have a full iBGP mesh. What path does traffic destined to 192.168.1.0/27 take from router R1?

Question90: Click the exhibit.

Router R2 is advertising prefix 192.168.1.0/27 with community "no-advertise" towards AS 65002.
Which routers receive an update for that prefix?

Question91: Click the exhibit.

Which of the following is a valid BGP configuration for router R2?

Question92: An Alcatel-Lucent 7750 SR is configured with a policy to export directly-connected networks to BGP.
Which of the following commands verifies that the export was successful?

Question93: Which of the following is NOT considered an option of import policies?

Question94: The user of an Alcatel-Lucent 7750 SR wants to see the effect of changing an import policy immediately.
What is the best command to force re-evaluation of the import policy with minimal impact?

Question95: Click the exhibit.

Router R6 is a route reflector for clients R1, R2 and R5. Router R5 is configured with a local preference of
200. On which routers is "advertise-external* needed for router R6 to receive exactly two distinct routes for prefix 192.168.1.0/27?

Question96: Click the exhibit.

After router A receives the BGP update for the 10.3.3.0/24 prefix, which routers will the route be propagated to?

Question97: Which of the following routes is NOT considered an internal route?

Question98: What kind of BGP attribute is the Multi_Exit_Disc?

Question99: Which of the following statements about an autonomous system is FALSE?

Question100: Click the exhibit.

Router R1 is a route reflector with clients R2, R5 and R6. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6. Assuming that routers R1, R2 and R4 are configured with "add-paths ipv4 send 2 receive", what is the expected output of "show router bgp routes" when executed on router R2?

Question101: Click the exhibit.

Which of the following about the relationship between ISP 1 and ISP 3 is TRUE?

Question102: Which of the following is FALSE regarding the 16-bit public autonomous system numbers?

Question103: Click the exhibit.

Considering that both routers C and D are advertising the eBGP learned prefix 10.5.0.0/16 into ISP X, which of the following best describes the route advertisement within ISP X?

Question104: Which of the following parameters does NOT have to match for an iBGP session to be successfully established?

Question105: Which of the following regarding BGP Path Identifier is FALSE?

Question106: Click the exhibit.

Given the following configuration of router R1, what can be said about the function of each of AS 65540s routers?

Question107: Why is a full mesh of iBGP peers required?

Question108: Click the exhibit.

Routers RR1 and RR2are route reflectors with clients R1x and R2x, respectively. Routers RR1 and RR2 are non-clients of each other, and router R1 is a non-client of both. Which of the following regarding BGP sessions in AS 65540 is TRUE?

Question109: Which of the following is NOT considered an option of export policies?

Question110: Which of the following statements regarding BGP route selection is TRUE?

Question111: Which of the following regarding the connections between eBGP peers is TRUE?

Question112: A confederated AS is comprised of three members. One member is comprised of 4 routers, while the other two members are comprised of 3 routers each. Assuming member ASs are fully meshed and use full mesh iBGP, what is the required number of BGP sessions within the confederation?

Question113: Which of the following statements regarding the Originator_ID attribute is TRUE?

Question114: What is the result of configuring the following policy statement as a BGP import policy on the Alcatel- Lucent 7750 SR?

Question115: Click the exhibit.

Router R6 is a route reflector for clients R1, R2 and R5 with local preferences 100, 200 and 500 respectively. Router R3 advertises prefix 192.168.1.0/27 to routers R1, R2 and R5 which are configured with advertise-external. Routers R4 and R6 are both configured with "add-paths ipv4 send 2 receive".
Which routes to 192.168.0.1/27 is router R4 expected to have in its BGP routing table?

Question116: What is the result of configuring the following policy statement as a BGP import policy on the Alcatel- Lucent 7750 SR?

Question117: Which of the following is the minimum requirement for an AS to be considered multi-homed?

Question118: Which of the following is TRUE if the state of one BGP neighbor shows Active?

Question119: Which of the following regarding "well-known discretionary'' BGP attributes is TRUE?

Question120: Which of the following best describes the relationship between locally configured policies and the direction of traffic?

Question121: Click the exhibit.

Assuming router A is configured with "next-hop-self", what does the BGP update for prefix 192.168.0.1/27 contain when it arrives at router B?

Question122: Which of the following regarding BGP confederations is FALSE?

Question123: Click the exhibit.

Given that ISP 1 and ISP 2 are Tier 2 providers, and that ISP 3 and ISP 4 are Tier 1 providers, what is the most likely relationship between the ISPs?

Question124: What are the well-known mandatory BGP attributes?

Question125: Which of the following statements regarding route reflectors is TRUE?

Question126: An Alcatel-Lucent 7750 SR receives a route from an eBGP peer with a MED value of 500. What MED value is sent to iBGP peers?

Question127: An Alcatel-Lucent 7750 SR is configured with a local preference of 250. If it receives a BGP update with a local preference of 500, what local preference is sent to its eBGP peers?

Question128: An Alcatel-Lucent 7750 SR receives a route from an eBGP peer without a MED. What MED value is sent to iBGP peers?

Question129: Which of the following statements about the BGP Advertise External feature is FALSE?

Question130: Which of the following commands would correctly configure the confederation AS number as 65200 with a member AS of 65202?

Question131: Based on the default settings for the Alcatel-Lucent 7750 SR, when a policy change is made and committed, what action is required by the user for the change to take effect?

Question132: Which of the following statements regarding BGP control plane convergence is FALSE?

Question133: Which of the following best describes the purpose of advertise-external?

Question134: Which of the following is NOT a BGP message type?

Question135: What is the purpose of configuring a triggered-policy on an Alcatel-Lucent 7750 SR?

Question136: Which of the following statements regarding BGP Add-Paths is FALSE?

Question137: A BGP session is in OpenConfirm state. Which of the following messages must be received to transition to Established state?

Question138: Click the exhibit.

Assume all router-IDs are properly configured. Which of the following configurations is required on the Alcatel-Lucent 7750 SR router A to establish an IPv6 BGP session to router D?

Question139: Which of the following regarding BGP confederations is FALSE?

Question140: Click the exhibit.

Over which BGP session will router B learn the 10.1.1.0/24 prefix?

Question141: A BGP router has loopback interfaces 192.168.1.1/27 and 192.168.2.1/27 advertised into BGP using the following export policy. The "aggregate 192.168.0.0/16" command is executed. What is the effect of this configuration?

Question142: Click the exhibit.

Router R6 is a route reflector with clients R1, R2, R4 and R5. Router R4 receives three routes from router R6 and is configured with ECMP 3. Given the following BGP configuration on routerR4, how many primary and backup paths will be present in router R4's BGP routing table?

Question143: Which of the following behaviors regarding the modification of BGP attributes within a confederation is TRUE?

Question144: Click the exhibit.

AS 65550 owns the CIDR block 10.64.0.0/12. Router R4 advertises the aggregate 10.64.0.0/12 to AS65540. Which of the following is TRUE regarding the aggregate route advertisement?

Question145: Two Alcatel-Lucent 7750 SRs are established BGP peers with the following add-paths configuration:
R1: configure router bgp add-paths ipv4 send 4 receive
R2: configure router bgp add-paths ipv4 send 2
If router R1 advertises three routes for a given prefix X, how many routes is router R2 expected to have for prefix X?

Question146: Which of the following about default BGP behavior is FALSE?