[Free] 2017(Oct) EnsurePass Testking Cisco 642-885 Dumps with VCE and PDF 1-10

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Deploying Cisco Service Provider Advanced Network Routing

Question No: 1

Refer to the Cisco IOS-XR show output exhibit.

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Which statement is correct?

  1. The [ ] indicates the configuration has a problem

  2. The [ ] indicates the 10.1.1.1 neighbor peering session has not been established

  3. The [ ] indicates the configuration was not inherited from a group

  4. The [ ] indicates the configuration has not been committed

  5. The [ ] indicates the corresponding BGP peer configuration has a mismatch configuration

Answer: C Explanation:

show bgp neighbors

Use the show bgp neighbors command to display information about the BGP configuration for neighbors.

鈥se the configuration option to display the effective configuration for the neighbor, including any settings that have been inherited from session groups, neighbor groups, or af-groups used by this neighbor.

鈥se the inheritance option to display the session groups, neighbor groups, and af-groups from which this neighbor inherits configuration settings.

The following example displays sample output from the show bgp af-group command using the configuration keyword. This example shows where each configuration item was inherited from. The default-originate command was configured directly on this address family group (indicated by [ ]). The remove-private-as command was inherited from address family group GROUP_2, which in turn inherited from address family group GROUP_3:

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Question No: 2

Refer to the exhibit.

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Given the partial BGP configuration, which configuration correctly completes the Cisco IOS-XR route reflector configuration where both the 1.1.1.1 and 2.2.2.2 routers are the clients and the 3.3.3.3 router is a non-client IBGP peer?

  1. neighbor 1.1.1.1 remote-as 65123 route-reflector-client neighbor 2.2.2.2 remote-as 65123 route-reflector-client neighbor 3.3.3.3 remote-as 65123

  2. neighbor 1.1.1.1

    address-family ipv4 unicast remote-as 65123

    route-reflector-client neighbor 2.2.2.2

    address-family ipv4 unicast remote-as 65123

    route-reflector-client neighbor 3.3.3.3

    address-family ipv4 unicast remote-as 65123

  3. neighbor 1.1.1.1 remote-as 65123

    address-family ipv4 unicast route-reflector-client neighbor 2.2.2.2

    remote-as 65123

    address-family ipv4 unicast route-reflector-client neighbor 3.3.3.3

    remote-as 65123

  4. neighbor 1.1.1.1 remote-as 65123 neighbor 1.1.1.1 route-reflector-client neighbor 2.2.2.2 remote-as 65123 neighbor 2.2.2.2 route-reflector-client neighbor 3.3.3.3 remote-as 65123

Answer: C

Question No: 3

In which four ways does DHCPv6 differ from DHCPv4? (Choose four.)

  1. DHCPv6 uses the same message types as DHCPv4.

  2. DHCPv4 functions without external protocols.

  3. A host discovers a DHCPv6 server by using a DHCP Discover packet.

  4. A hosts discovers a DHCPv6 server by using a DHCP Solicit packet.

  5. A DHCPv6 server replies with a DHCP Offer packet.

  6. A DHCP server replies with a DHCP Advertise message.

  7. An IPv6 host can request multiple addresses at the same time from a DHCPv6 server.

  8. An IPv6 host can request only one IP address at a time from a DHCPv6 server.

Answer: B,D,F,G

Question No: 4

Which optionshowsthe equivalent multicast MAC address mapping of multicast address 239.210.101.190?

A. 01:00:5e:52:65:be

B. 01:00:5d:52:65:be

C. 01:00:5f:52:65:be

D. 01:00:5c:52:65:be

Answer: A

Question No: 5

Which three statements are correct regarding PIM-SM? (Choose three.)

  1. There are three ways to configure the RP: Static RP, Auto-RP, or BSR

  2. PIM-SM only uses the RP rooted shared tree and has no option to switch over to the shortest path tree

  3. Different RPs can be configured for different multicast groups to increase RP scalability

  4. Candidate RPs and RP mapping agents are configured to enable Auto-RP

  5. PIM-SM uses the implicit join model

Answer: A,C,D

Question No: 6

What is one of the configuration errors within an AS that can stop a Cisco IOS-XR router from announcing certain prefixes to its EBGP peers?

  1. Some prefixes were mistagged with the no-export BGP community

  2. Some prefixes were set with an MED of 0

  3. The outbound BGP route policy only has set actions defined without any pass actions defined

  4. The inbound BGP route policy only has set actions defined without any pass actions defined

Answer: A

Question No: 7

Which field in the IPv6 header can be used to set the DSCP value?

  1. Flow Label

  2. Type of Service

  3. Traffic Class

  4. Precedence

  5. EXP

Answer: C Explanation: Traffic Class

The Traffic Class field is an 8 bit field that is used to signify the importance of the data contained within this specific packet. With IPv4, this information was signified with the TOS field and supported both IP precedence and Differentiated Services Code Point (DSCP).

The Traffic Class field used with IPv6 supports DSCP solely; this specification uses the first 6 bits to indicate the Per Hop Behavior (PHB) of the contained data; these PHB’s are defined in RFC 2474 and its additions.

Question No: 8

Which four statements are correct regarding MSDP configurations and operations? (Choose four.)

  1. The MSDP peers are also typically the RPs in respective routing domains.

  2. SA messages are flooded to all other MSDP peers without any restrictions

  3. On Cisco IOS, IOS-XE, and IOS-XR, the router can be configured to cache the SA messages to reduce the join latency

  4. SA messages are used to advertise active sources in a domain

  5. MSDP establishes neighbor relationships with other MSDP peers using TCP port 639

  6. MSDP peerings on Cisco IOS, IOS-XE, and IOS-XR support MD5 or SHA1 authentication

Answer: A,C,D,E

Question No: 9

Which protocol can be used to secure multicast in a group multicast solution where group key management is needed for secure key exchange?

  1. DOI

  2. ISAKMP

  3. GDOI

  4. IPsec

Answer: C

Question No: 10

Which types of multicast distribution tree can PIM-SM use?

  1. Only shared tree rooted at the source

  2. Only shared tree rooted at the RP

  3. Only shortest path tree rooted at the RP

  4. Shared tree rooted at the source and shortest path tree switchover

  5. Shared tree rooted at the RP and shortest path tree switchover

  6. Shared tree rooted at the first-hop router and shortest path tree rooted at the RP

Answer: E

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