4A0-102 Exam Questions
113 real 4A0-102 exam questions with expert-verified answers and explanations. Page 2 of 3.
- Question #55BGP Fundamentals
Which of the following parameters does NOT have to match for an iBGP session to be successfully established?
iBGP session establishmentBGP parametersHold Time negotiationBGP peer requirements - Question #56BGP Fundamentals
Which of the following regarding the TTL of a BGP message is TRUE?
BGP TTL defaultseBGP vs iBGPBGP message structureTTL security - Question #57BGP Fundamentals
Which of the following about a single-homed AS is FALSE?
single-homed ASstub/leaf AStransit vs non-transitAS connectivity models - Question #58BGP Fundamentals
Click the exhibit. Which of the following about the relationship between ISP 1 and ISP 3 is TRUE?
Upstream/Downstream relationshipISP peeringTraffic flow patternsProvider-Customer model - Question #59BGP Fundamentals
Which of the following statements about an autonomous system is FALSE?
Autonomous SystemRoute AdvertisementBGP FundamentalsRouting Policy - Question #60BGP Attributes and Path Selection
Which of the following regarding the atomic aggregate attribute is TRUE?
atomic aggregateroute aggregationAS PathBGP attributes - Question #61BGP Routing Policy
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?
policy-applicationBGP-routing-policyconfiguration-commitautomatic-behavior - Question #62BGP Attributes and Path Selection
Which of the following statements regarding BGP route selection is TRUE?
BGP route selectionLocal preferenceMEDRouter ID - Question #63BGP Routing Policy
Which of the following describes BGP route processing on the Alcatel-Lucent 7750 SR?
BGP route processingimport policiesRIB-In flowdefault behavior - Question #64BGP Routing Policy
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?
BGP route exportRoute verificationBGP policyHunt command - Question #65BGP Attributes and Path Selection
An Alcatel-Lucent 7750 SR receives two updates for the same route with local preferences 200 and 300, respectively. What local preference is sent to eBGP peers?
Local PreferenceeBGP AttributesiBGP vs eBGPBGP Path Selection - Question #66BGP Attributes and Path Selection
An Alcatel-Lucent 7750 SR receives a route from an eBGP peer without a MED. What MED value is sent to iBGP peers?
MED attributeeBGP behavioriBGP propagationBGP attributes - Question #67BGP Routing Policy
Which of the following is NOT a goal of BGP routing policies?
BGP routing policiespolicy objectivesAS protectiontraffic optimization - Question #68BGP Attributes and Path Selection
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 regardin...
BGP Aggregationas-setAS PathAtomic Aggregate - Question #69BGP Attributes and Path Selection
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, a...
Local PreferencePath SelectioniBGP MeshBGP Attributes - Question #70BGP Routing Policy
How are policy direction and data flow related on the Alcatel-Lucent 7750 SR?
BGP PolicyImport/Export PoliciesData Flow ControlRoute Advertisement - Question #71BGP Configuration
Which of the following prefix-lists is the most specific match for prefix 172.31.2.1/24?
Prefix-list matchingCIDR notationLongest prefix matchIP addressing - Question #72BGP Configuration
Which of the following commands would correctly configure the confederation AS number as 65200 with a member AS of 65202?
BGP ConfederationAS ConfigurationNokia Router CLIConfederation Syntax - Question #73BGP Attributes and Path Selection
What is the function of the Cluster_List attribute?
Cluster_ListLoop DetectionRoute ReflectionBGP Attributes - Question #74BGP Fundamentals
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 19...
Route ReflectorRoute PropagationBGP Client AdvertisementsRoute Advertisement - Question #75BGP Fundamentals
Which of the following routes is NOT considered an internal route?
internal vs external routesBGP confederationspeer relationshipsroute classification - Question #76BGP Attributes and Path Selection
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 arriv...
AS Path attributeNext Hop attributenext-hop-selfattribute propagation - Question #77BGP Fundamentals
Which of the following is NOT a BGP message type?
BGP message typesProtocol messagesSession establishmentBGP basics - Question #78BGP Fundamentals
Which of the following is TRUE if the local state of BGP is OpenConfirm?
BGP State MachineOpenConfirm StateBGP Session EstablishmentBGP Handshake - Question #79BGP Fundamentals
Which of the following regarding the withdrawal of routes from one BGP speaker to another is TRUE?
BGP UPDATE messagesRoute withdrawalWITHDRAWN ROUTES fieldBGP protocol mechanics - Question #80BGP Fundamentals
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?
iBGP split-horizoneBGP neighborsroute propagationBGP peer types - Question #81BGP Attributes and Path Selection
What kind of attribute is the aggregator?
BGP AttributesAggregatorOptional TransitivePath Attributes - Question #82BGP Fundamentals
Click the exhibit. Over which BGP session will router B learn the 10.1.1.0/24 prefix?
BGP sessionsroute advertisementneighbor relationshipsroute learning - Question #83BGP Attributes and Path Selection
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?
AS PathBGP attributesAS_SET notationRoute accumulation - Question #84BGP Configuration
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 me...
BGP ConfederationFull Mesh iBGPBGP SessionsAS Topology - Question #85BGP Configuration
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 ad...
BGP add-pathspath advertisementsend/receive limitsmultipath dissemination - Question #86BGP Attributes and Path Selection
Which of the following statements regarding BGP Fast Reroute is FALSE?
BGP Fast RerouteBackup Path ProtectionFailover ConvergencePath Selection Tradeoffs - Question #87BGP Configuration
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 o...
MultipathAdd-pathsBackup-pathsRoute Reflector - Question #88BGP Attributes and Path Selection
What will happen if an update is received with an unrecognized optional non-transitive attribute?
BGP attributesOptional non-transitiveUnrecognized attributesAttribute handling - Question #89BGP Fundamentals
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?
iBGP route advertisementeBGP learned routesAS-internal propagationiBGP neighbors - Question #90BGP Fundamentals
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?
ISP tierspeering relationshipstransit relationshipsBGP interconnection - Question #91BGP Attributes and Path Selection
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 65000, local Preference of 100, MED of 100, and router ID 10.10.1.10. The...
Longest Prefix MatchRoute SelectionCIDR SpecificityOverlapping Prefixes - Question #92BGP Fundamentals
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 u...
split-horizon ruleBGP propagationroute advertisementneighbor filtering - Question #93BGP Attributes and Path Selection
How is the aggregator attribute handled with 32-bit AS numbers?
32-bit AS NumbersAggregator AttributeAS4_AggregatorExtended AS Path - Question #94BGP Fundamentals
A BGP session is in OpenConfirm state. Which of the following messages must be received to transition to Established state?
BGP state machineSession establishmentBGP messagesKeepalive - Question #95BGP Attributes and Path Selection
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...
BGP Path SelectionLocal PreferenceAS PathRIB-Out - Question #96BGP Configuration
The configuration of an Alcatel-Lucent 7750 SR is given below. Router R1 has established BGP sessions with routers R2 and R3. Which of the following is TRUE? ``` R1>config>router>b...
iBGP vs eBGPBGP peer-as configurationBGP neighbor configurationincomplete configuration analysis - Question #97BGP Configuration
Which of the following regarding route reflectors is TRUE?
Route ReflectorsCluster IDiBGP MeshBGP Scaling - Question #98BGP Configuration
Click the exhibit. Which of the following is a valid confederation configuration for Router R2?
BGP ConfederationAS ConfigurationMember AS NumbersConfiguration Syntax - Question #99BGP Routing Policy
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 192.1...
Route Reflectorsadvertise-externalLocal PreferenceBGP Advertisement - Question #100BGP Attributes and Path Selection
Click the exhibit.
Best Path SelectionLocal PreferenceBGP AttributesiBGP Routes - Question #101BGP Configuration
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?
BGP Router IDIPv6 BGP NeighborBGP Configuration SyntaxBGP Session Parameters - Question #102BGP Attributes and Path Selection
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 R...
route-reflectorscluster-IDCLUSTER_LISTloop-prevention - Question #103BGP Configuration
An autonomous system has 7 routers configured with BGP. How many iBGP sessions are required for a fully meshed configuration?
iBGP full meshBGP peering topologymesh calculationssession count - Question #104BGP Attributes and Path Selection
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?
32-bit vs 16-bit AS numbersAS_TRANS (23456)AS Path translationBGP compatibility