EMT Practice Test

1. Question Content...

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Question1: How many bits does DSCP use to provide QoS marking options?

Question2: Community lists are configured for the PE hub and spoke VPRN. Which communities should be exported by the VPRN service on PE1?

Question3: Which of the following statements regarding policing and shaping on the Alcatel-Lucent 7750 SR are TRUE? (Choose two)

Question4: What is the MTU impact on the SDP path-mtu if fast reroute, one-to-one mode is implemented on the LSP?

Question5: What is the default Alcatel-Lucent 7750 SR TTL of a BGP advertisement between confederation members?

Question6: 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?

Question7: 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?

Question8: A default network policy is applied to all router interfaces associated with network ports.

Question9: The policies shown below from the configuration of an Alcatel-Lucent 7750 SR have been created to implement an Extranet VPRN between the main sites of two separate VPRNs. How should these policies be applied?

Question10: A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet Service Provider (ISP). Which of the following about route distribution is FALSE?

Question11: Which of the following statements regarding the Internet is FALSE?

Question12: What class of attribute is Originator_ID?

Question13: Traffic assigned to forwarding classes is placed into queues, while the contents of the queues are serviced in a controlled manner using____________.

Question14: Which of the following statements are TRUE regarding the remarking of packets arriving on the network interface whose ToS-marking-state is set to trusted and remarking enabled on network egress? (Choose two)

Question15: Which of the following are possible criteria for classifying packets at the SAP-ingress? (Choose three)

Question16: Click the exhibit button below. A service provider has applied the SAP-ingress policy configuration below on his customer's SAP. The service provider notices that all of the customer's traffic is being dropped at the SAP-ingress. Which of the following actions can resolve the problem, if applied on its own? (Choose three)

Question17: Which of the following about the maximum number of routes that can be accepted in a VRF for a VPRN service on the Alcatel-Lucent 7750 SR is FALSE?

Question18: 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?

Question19: Which of the following is not a valid BGP design for a network provider supporting VPRNs?

Question20: According to the display, a BGP loop is detected for route 192.168.1.0/27. On which router is this command executed?

Question21: 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?

Question22: To manage the shared buffer space at network ports, slope policies are applied on _________ for the ingress direction, and on ________ or _________ for the egress direction.

Question23: Which of the following is a valid confederation configuration for Router R2?

Question24: Which of the following statements regarding DSCP bits are TRUE? (Choose three)

Question25: Which of the following are trusted boundaries, by default? (Choose two)

Question26: If the device connected to PE-A in Metro A sends a frame to PE-A that requires replication within the VPLS which devices is PE-A responsible for replicating the frame to?

Question27: Which of the following describes how a route is handled when is received at the PE from the local CE?

Question28: Which of the following regarding BGP confederations is FALSE?

Question29: A customer has requested a VPLS service. The customer is using dot1q encapsulation and they have requested that all vlan tags be transparently passed. Which two SAP IDs will accept VLAN tags and pass them transparently? (Choose 2)

Question30: Which of the following about the inter-AS model A VPRN configuration on ASBR1 is TRUE?

Question31: 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?

Question32: In a VPRN, what type of logical topology is required for the BGP sessions configured in the provider core?

Question33: Click the exhibit button below. Given the scheduler-policy (below), how much bandwidth can the best-effort traffic receive (PIR and CIR) when the ingress rate of each queue is 10Mbps?

Question34: 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?

Question35: Which of the following fields can be marked or remarked for frames belonging to a Layer 2 service?

Question36: What is PBB also known as?

Question37: 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?

Question38: In the context of hierarchical scheduling, a scheduler is configured with a CIR weight of 0. Which of the following statements is TRUE?

Question39: Which of the following is NOT a BGP message type?

Question40: Which of the following about scaling techniques for route reflectors is FALSE?

Question41: What of the following is a key benefit of Active/Standby pseudowires?

Question42: Which of the following statements regarding the default scheduler in the Alcatel-Lucent 7750 SR are TRUE? (Choose two)

Question43: A customer has two sites connected to PE-1 and a third site dual-homed to PE-2 and PE-3. If BGP is used as the PE-CE protocol, what is the total number of BGP and MP-BGP sessions required on PE-1 for a functional VPRN service? Assume that route reflection is not used.

Question44: Which of the following is not an available option for Route Distinguisher assignment?

Question45: Which of the following statements is true? Choose the best answer.

Question46: Which of the following statements best describes the BGP sessions within the given network?

Question47: You are configuring a VPLS spoke termination to a VPRN on an Alcatel-Lucent 7750 SR. If LDP is used for all transport tunnels, what type of sessions are established by the VPRN PE router that is configured with the spoke termination?

Question48: The operation of a VPLS can be best described by which of the following statements?

Question49: .
A Carrier Supporting Carrier (CSC) VPRN is configured on an Alcatel-Lucent 7750 SR for a customer carrier offering VPRN services. Which of the following about this configuration is FALSE?

Question50: Click on the exhibit below.

Based on the output below which of the following statements is true?

Question51: 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?

Question52: Which of the following commands on an Alcatel-Lucent 7750 SR will verify connectivity for a VPRN service <service-id> when issued from the PE?

Question53: An l-VPLS can be associated with many B-VPLS services.

Question54: Click on the exhibit below.

Assume there are two VPLS services configured on the MDU. How could load-balancing be achieved when using Active/Standby pseudowires?

Question55: Which of the following devices would typically have VRF instances?

Question56: The AS-path nullification method is used to prevent CE2 from discarding routes received from CE1. On which router should the AS-path nullification policy be configured?

Question57: 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?

Question58: Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

Question59: Routers RR1 are RR2 are redundant route reflectors for clients R3 and R4. Which of the following is a valid configuration on router R3?

Question60: Click on the exhibit below.

Based on the output below which of the following statements is true? (Choose 2)

Question61: What kind of attribute is the aggregator?

Question62: It is necessary for Tier 1 schedulers to obtain bandwidth from a higher tier scheduler.

Question63: VPN-IPv4 addressing is made unique by defining an address structure consisting of:

Question64: For the Carrier Supporting Carrier (CSC) VPRN, which routes are advertised between CSC-CE1 andCSC-PE1?

Question65: Which of the following describes the overhead added to a customer frame on an Ethernet link in a VPLS service on the Alcatel-Lucent 7750 SR?

Question66: What needs to be configured in a VPLS in order to forward customer STP BPDUs transparently?

Question67: On the Alcatel-Lucent 7750 SR, what is the maximum number of queues that a single SAP-ingress policy can support in a VPLS?

Question68: Click the exhibit.

Internet access using route leaking between the VRF and the global routing table is configured in the network. Which of the following is the correct output of route 192.168.50.1 in the global routing table of PE3?

Question69: 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?

Question70: If the displayed command is executed, what is the correct value of AS-Path in the BGP route 172.12.0.0/16 advertised by PE2?

Question71: Which of the following about inter-AS model B VPRN is FALSE?

Question72: For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is an ISP that provides Internet connectivity to its end-customers, which of the following is TRUE?

Question73: Which SDP on R3 will MAC addresses be associated with for devices behind R2?

Question74: Upon the successful establishment of a TCP session between peers, what type of BGP message is exchanged?

Question75: What are the benefits of a hierarchical VPLS architecture? (Choose 3)

Question76: For the inter-AS model A VPRN. BGP is used as the PE-CE routing protocol. Which of the following statements about the control plane operation is TRUE?

Question77: Which of the following are required for an operational mesh-sdp binding for bidirectional traffic when signaling is enabled within the SDP? (Choose 3)

Question78: How does PBB forward broadcast, unknown-unicast and multicast traffic from a B-VPLS to an l-VPLS?

Question79: In Rapid Spanning Tree Protocol, a Backup Port is on the same switch as a Designated Port?

Question80: 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?

Question81: 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?

Question82: What is the result of configuring the following policy statement as a BGP import policy on the Alcatel-Lucent 7750 SR?

Question83: A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is a BGP/MPLS service provider. Which of the following describes the routes present in PE1's global routing table?

Question84: Click the exhibit button below. Given the scheduler-policy (below), which of the following can be done to guarantee that the best-effort traffic receives its configured CIR value?

Question85: A service provider is using GRE for his transport tunnel on the Alcatel-Lucent 7750 SR. How can traffic be marked as it traverses the service provider's network? (Choose two)

Question86: An l-VPLS is configured with a service id of 511. What will the value of the l-SID be assuming a default configuration?

Question87: Which of the following technologies allows for two explicit VLAN tags to be received from a customer device?

Question88: Which command may be used on an Alcatel-Lucent 7750 SR to verify the number of VRF routes allowed, based on the maximum routes value configured in the service instance?

Question89: Which single command will verify the state of auto-bind, the configured Route Distinguisher and Route Target, in addition to the SAP and SDP bindings for a particular service on an Alcatel-Lucent 7750 SR?

Question90: 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?

Question91: Router R1, in AS 65540, has the export policy shown below. It advertises an aggregate route to eBGP peer router R2 in 65550. What is the AS Path of the aggregate route received by router R2?

Question92: Which of the following is FALSE regarding the 16-bit public autonomous system numbers?

Question93: What is the default service-mtu for a VPLS service?

Question94: Which of the following describes BGP route processing on the Alcatel-Lucent 7750 SR?

Question95: Given the following VPRN topology: The VPRN service 10 is correctly configured and operational with OSPF as the PE to CE routing protocol at both customer sites. The OSPF database on CE-A contains Type 1 LSAs. These routes will appear as what LSA type on CE-B?

Question96: Which of the following about a single-homed AS is FALSE?

Question97: What happens to a route that is rejected by an import policy on an Alcatel-Lucent 7750 SR?

Question98: The "discard-unknown" command has been enabled at the VPLS level. Which of the following statements is true? (Choose 2)

Question99: Which of the following about the control plane in Carrier Supporting Carrier (CSC) VPRN is FALSE?

Question100: What option is available when using PBB to reduce the amount of required VPLS services?

Question101: How many route targets and route distinguishers are required to implement the extranet VPRN?

Question102: 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?

Question103: What action will be taken when an MPLS router receives a frame with a label that does not exist in the LFIB?

Question104: Which of the following statements regarding BGP Add-Paths is FALSE?

Question105: A router has just learned the 10th MAC address while the FDB size is also set to 10. What is the likely outcome?

Question106: Which OAM tool can be used to dynamically learn the MAC address of a CE device connected to a SAP within a VPLS service?

Question107: Which of the following statements BEST describes where shaping mechanisms should be applied?

Question108: When configuring the CE with the selected CE-PE routing protocol on an Alcatel-Lucent 7750 SR, which of the following statements is true? (Choose three.)

Question109: PE3 learns Internet routes via its VRF interface to the Internet peering router and stores them in its Internet VRF. CE1 is connected to the Red VPN and requires Internet access via its Red VRF interface. Which of the following statements do not fulfill this requirement?

Question110: Assuming that "client1" and "client2" are directly-connected networks, what is the result of executing the following BGP export policy?

Question111: For the inter-AS model B VPRN, which of the following is FALSE when CE2 sends an IP packet to 192.168.1.1?

Question112: Which of the following statements regarding BGP Fast Reroute is FALSE?

Question113: 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?

Question114: 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?

Question115: 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?

Question116: You have been requested to add load balancing across the redundant spoke-SDPs in the network shown. What further configuration is required? (Choose 2)

Question117: A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is a BGP/MPLS service provider. Which route is present in PE1's global routing table?

Question118: When using the AS-override method to prevent BGP loops in VPRNs, where should the "as-override" CLI command be configured?

Question119: In RSTP, which state do all ports initialize in?

Question120: Which of the following regarding route reflectors is TRUE?

Question121: In a Carrier Supporting Carrier (CSC) VPRN, which of the following is NOT a benefit to the network provider?

Question122: AS-override is configured on PE1 to eliminate the BGP loops. What is the expected AS-Path in the VPN-IPv4 route 64496:10:192.168.2.0/27 received by PE1?

Question123: When does a router add a Route Target to a route?

Question124: Which of the following statements are TRUE? (Choose two)

Question125: Assuming TLDP and RSVP are both being used in an MPLS network core which of the following statements is true?

Question126: When a PE node receives a PBB encapsulated frame on a B-VPLS, how does the PE determine which l-VPLS it belongs to?

Question127: An extranet VPRN is configured on Alcatel-Lucent 7750 SRs. On which router(s) should the displayed configuration be applied?

Question128: Which of the following about the relationship between ISP 1 and ISP 3 is TRUE?

Question129: How is the aggregator attribute handled with 32-bit AS numbers?

Question130: IEEE 802.3ah frames must be untagged.

Question131: Click the exhibit.

When configuring the double lookup functionality, which configuration forces the global routing table to be consulted for any packet matching the VPRN default route?

Question132: 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?

Question133: For the inter-AS model B VPRN, which of the following is the correct BGP configuration on ASBR1?

Question134: In a traditional layer 3 VPN which of the following will be an issue when there is overlapping address space between two customers? Choose the best answer.

Question135: What is the DA address used for in the Ethernet Header?

Question136: For the data packets in a VPRN, how is the inner label in an MPLS packet signaled?

Question137: 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?

Question138: For the PE hub and spoke VPRN, on which PE(s) should the VPRN service command target export target: 65100:1 import target: 65100: 2 " be configured?

Question139: Click the exhibit button below. A partial SAP-ingress policy configuration is shown below. A UDP video stream is sent to a PC with IP address 192.168.1.100. Given the SAP-ingress policy, to which forwarding class is the traffic matched?

Question140: What is the maximum number of VLANs supported on a traditional Layer 2 switch?

Question141: Click the exhibit.

For the inter-AS model C VPRN, which of the following is FALSE when an IP packet is sent from 192.1.1.1 to 192.2.1.1?

Question142: Which of the following is the minimum requirement for an AS to be considered multi-homed?

Question143: Which of the following are possible criteria for classifying packets at the network port ingress on the Alcatel-Lucent 7750 SR? (Choose three)

Question144: Which VPRN type produces the output shown on router R1?

Question145: The service-mtu of a VPLS using MPLS encapsulation is set to 9100. What is the minimum MTU value that can be set for the network port if fast re-route facility mode is used on the SDP LSP?

Question146: 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?

Question147: Routers RR1 and RR2 are configured as route reflectors. For the inter-AS model C VPRN, which of the following about the BGP sessions established between the routers is TRUE?

Question148: Redundant spoke-SDPs are used between 2 Metro networks for redundancy. How can load balancing be achieved across the redundant spoke-SDPs?

Question149: Which of the following is a true statement?

Question150: Which of the following about the configuration of VPRN Outbound Route Filtering (ORB on an Alcatel-Lucent 7750 SR is TRUE?

Question151: 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?

Question152: Which of the following statements is considered best practice when changing a network policy that has been associated with an interface?

Question153: Click the exhibit button below.

At router PE1, customer packets are arriving tagged with a dotlp value of 6 and marked with a DSCP value of EF.
Based on the configuration shown below for a VPLS service, what will be the DSCP and EXP marking for the packet egressing the network port on this PE router? (Choose two)

Question154: Which of the following statements BEST defines policing?

Question155: Based on the VPRN aggregate route configuration, which routes are advertised to CE2?

Question156: The service MTU on PE-A is 1514 bytes and the service MTU on PE-C is 1518 bytes. What is the status of the mesh-sdp between PE-A and PE-C?

Question157: When VPRN Outbound Route Filtering (ORF) is enabled, each PE sends its ORF list to its peer using which of the following BGP message types?

Question158: How does the IEEE 802.1ag loopback function differently from the loopback feature in 802.3ah? (Choose 2)

Question159: Which of the following should be performed if a service provider does not want packets to make use of the shared buffer space when queued?

Question160: Click on the exhibit below.

Assume the port on CE-A is sending two tags, a top tag of 100 and a bottom tag of 500. PE-A is configured with a SAP id of 1/1/1:100.*. How should PE-B be configured if CE-B is expecting a top tag of 200 and a bottom tag of 500?

Question161: Click on the exhibit below.

The following VPLS services and SAPs have been configured. Which of the following statements is true?

Question162: Which of the following is NOT a feature of the IEEE 802.3ah EFM standard?

Question163: Which of the following statements are TRUE when discussing self-generated traffic QoS? (Choose two)

Question164: Click on the exhibit below.

How many LSPs are required in total between Metro A and Metro B if 100 hierarchical VPLS services are deployed across the two metro networks?

Question165: 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?

Question166: Which of the following statements regarding scheduling are TRUE? (Choose two)

Question167: Which of the following statements about a management VPLS are true? (Choose 2)

Question168: Which of the following regarding BGP Path Identifier is FALSE?

Question169: What configuration is required on the CE device when using MC-LAG?

Question170: Assume PE-B expects avian tag as part of the RFC 4762 (Martini) encapsulation. How must PE-A be configured?

Question171: A LAG is configured with LACP passive mode enabled. When will LACP packets be sent?

Question172: One of the shortcomings of Spanning Tree Protocol (STP) is that it computes a valid, but not necessarily optimal, path between nodes within a network.

Question173: Which of the following is NOT a viable option when implementing inter-AS VPRN?

Question174: Which of the following about the Route Target is TRUE?

Question175: What is the maximum number of forwarding subclasses a forwarding class can have?

Question176: A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is a BGP/MPLS service provider. If CE1 sends an IP packet to 192.168.200.1, which of the following is FALSE?

Question177: How does an IOM3 improve the queue usage over an IOM2 in an Alcatel-Lucent 7750 SR? (Choose two)

Question178: What is the default fdb size for a VPLS service?

Question179: MC-LAG is only supported on network ports.

Question180: Click the exhibit button below. A network operator has configured the SAP-ingress policy below. Ping traffic is expected in queue 3. However, the network operator notices that all traffic is placed in queue 1. What is the most probable reason for this?

Question181: Which statement about assigning one Route Distinguisher per VPN is TRUE?

Question182: In RSTP, an alternate port is on the same switch as a designated Port.

Question183: Over which BGP session will router B learn the 10.1.1.0/24 prefix?

Question184: Click on the exhibit below.

A new site is added to PE-D of Metro B. Which of the following statement below is true?

Question185: Which of the following statements regarding the Originator_ID attribute is TRUE?

Question186: Which of the following statements best describes the output from an Alcatel-Lucent 7750 SR shown below?

Question187: On an Alcatel-Lucent 7750 SR, which CLI command displays the Route Target(s) associated to a prefix?

Question188: After router A receives the BGP update for the 10.3.3.0/24 prefix, which routers will the route be propagated to?

Question189: How do user VPLSs become associated with a management VPLS for redundant spoke-sdp connections?

Question190: Which of the following describes the scope of the IEEE 802.3ah EFM standard? (Choose 3)

Question191: Which of the following best describes the purpose of advertise-external?

Question192: All sites in the displayed network require Internet access. Route reflector 1(RR1) is used for Internet routes only and route reflector 2(RR2) is used for VPN routes only. Which of the following is FALSE?

Question193: Based on the VPRN BGP decision process, which of the following routes is selected first if the command "PE1>config>service>vprn> bgp best-path-selection as-path-ignore" is executed?

Question194: The headquarter sites of VPRN 10 and VPRN 20 are part of an extranet VPRN. Which route targets should be exported under the VPRN 20 service on router R1?

Question195: A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet Service Provider (ISP). If CE1 sends an IP packet to 192.60.100.1, which of the following is FALSE?

Question196: Forwarding subclasses are only relevant to, and are therefore applied within the context of, a _____________policy.

Question197: An MC-LAG is configured with default parameters. When a failed interface recovers, the active link reverts to the restored interface.

Question198: Which of the following about VPRN Outbound Route Filtering (ORF) is FALSE?

Question199: WRED can be used to help avoid TCP slow-start synch problems.

Question200: Why would a selective export policy be applied to a customer VPRN service? (Choose three)