Cisco 642-887 Online Practice Questions and Exam Preparation

Cisco 642-887 Online Questions & Answers

• Question 1:

  Which affinity value will be matched by the affinity bit mask of the affinity 0xFF00000A mask 0xFFFF000F command?

  A. 0xFFFF000A
  B. 0xFF00EEEA
  C. 0xFF000000
  D. 0x00000000
  E. 0x11110001
  B. 0xFF00EEEA

  ---

  0xFF00000A 11111111000000000000000000001010 0xFFFF000F 11111111111111110000000000001111 0xFF00EEEA 11111111000000001110111011101010

• Question 2:

  On Cisco routers, which QoS marker is only locally significant?

  A. DSCP
  B. MPLS EXP
  C. IP precedence
  D. QoS group
  E. discard eligible (DE)
  D. QoS group

• Question 3:

  Refer to the exhibit. What happens to the traffic that exceeds the CIR?

  A. It is set an EXP value of 5 and transmitted
  B. It is set an EXP value of 5 and dropped
  C. It is set an EXP value of 0 and transmitted
  D. It is set an EXP value of 3 and dropped
  C. It is set an EXP value of 0 and transmitted

• Question 4:

  Which Cisco IOS XR command should be used in order to enable LDP-IGP synchronization for the ISIS IGP protocol?

  A. RP/0/RSP0/CPU0:R1(config-isis-if-af)#mpls ldp sync
  B. RP/0/RSP0/CPU0:R1(config-isis)#mpls ldp sync
  C. RP/0/RSP0/CPU0:R1(config-ldp)#isis ldp sync
  D. LDP-IGP synchronization is not supported for the ISIS IGP protocol on Cisco IOS XR platforms
  A. RP/0/RSP0/CPU0:R1(config-isis-if-af)#mpls ldp sync

• Question 5:

  Which feature should you configure to enable routers to maintain MPLS label information despite link flaps on an interface?

  A. Targeted Adjacency
  B. IGP Synchronization
  C. MPLS LDP Session Protection
  D. NSR
  C. MPLS LDP Session Protection

• Question 6:

  Which option is the correct definition of the LB on a Cisco router?

  A. a table used by switching functions to forward labeled packets
  B. a table that holds the next hop for destination prefixes
  C. a label-based adjacency table
  D. a table that stores remote and local label bindings
  A. a table used by switching functions to forward labeled packets

• Question 7:

  What is the function of MPLS FRR?

  A. automatically repairs LDP adjacency issues for MPLS TE tunnel endpoints
  B. automatically updates BGP prefixes during link failures
  C. automatically redirects MPLS TE traffic away from degraded links
  D. routes traffic onto a backup MPLS TE tunnel during link failures
  D. routes traffic onto a backup MPLS TE tunnel during link failures

• Question 8:

  When using the tunnel mpls traffic-eng path-option 1 explicit name test command in Cisco MPLS TE tunnel configurations, the test explicit-path configuration will consist of a list of which values?

  A. tunnel endpoint
  B. resource class affinity
  C. MPLS label
  D. IP address
  D. IP address

  ---

  tunnel mpls traffic-eng path-option

  To configure a path option for a Multiprotocol Label Switching (MPLS) traffic engineering tunnel, use the tunnel

  mpls traffic-eng path-option command in interface configuration mode. To disable the specified path option, use the no form of this command.

  tunnel mpls traffic-eng path-option number {dynamic | explicit {name path-name | path-number}} [lockdown]

  no tunnel mpls traffic-eng path-option number {dynamic | explicit {name path-name | path-number}} [lockdown]

  Syntax Description

  number = When multiple path options are configured, lower numbered options are preferred.

  dynamic = Path of the LSP is dynamically calculated.

  explicit = Path of the LSP is an IP explicit path.

  name path-name = Path name of the IP explicit path that the tunnel uses with this option. path-number = Path number of the IP explicit path that the tunnel uses with this option. lockdown = (Optional) The LSP cannot be reoptimized.

  Usage Guidelines

  You can configure multiple path options for a single tunnel. For example, there can be several explicit path options and a dynamic option for one tunnel. Path setup preference is for lower (not higher) numbers, so option 1 is preferred.

  Examples

  The following example shows how to configure the tunnel to use a named IP explicit path:

  Router(config-if)# tunnel mpls traffic-eng path-option 1 explicit name test

• Question 9:

  Which two values are class-selector DSCP values? (Choose two.)

  A. 001001
  B. 000111
  C. 111000
  D. 100000
  E. 000001
  C. 111000
  D. 100000

• Question 10:

  Which two traffic types are recognized by NBAR default configuration settings? (Choose two.)

  A. HTTP URL
  B. Sun RPC
  C. TCP
  D. UDP
  E. HTTPS URL
  A. HTTP URL
  B. Sun RPC