Cisco 642-873 Online Practice Questions and Exam Preparation

Cisco 642-873 Online Questions & Answers

• Question 121:

  Which Cisco feature can be run on a Cisco router that terminates a WAN connection, to gather and provide WAN circuit information that helps switchover to dynamically back up the WAN circuit?

  A. Cisco Express Forwarding
  B. IP SLA
  C. passive interface
  D. traffic shaping
  B. IP SLA

• Question 122:

  Which option is the Cisco recommendation for data oversubscription for access ports on the access-to-distribution uplink?

  A. 4 to 1
  B. 20 to 1
  C. 16 to 1
  D. 10 to 1
  B. 20 to 1

• Question 123:

  An HSRP design requirement states that preemption must be enabled for the active switch, which is a Cisco 4507R. Assume a boot time of 300 seconds. Which setting of the preemption delay timer minimizes the loss of traffic?

  A. 50 seconds
  B. 100 seconds
  C. 150 seconds
  D. 200 seconds
  C. 150 seconds

• Question 124:

  Which three of these Metro service types map to E-Line (versus E-LAN) services that are defined by the Metro Ethernet Forum (MEF)? (Choose three.)

  A. Ethernet Private Line
  B. Ethernet Wire Service
  C. Ethernet Relay Service
  D. Ethernet Multipoint Service
  E. Ethernet Relay Multipoint Service
  A. Ethernet Private Line
  B. Ethernet Wire Service
  C. Ethernet Relay Service

• Question 125:

  A network designer wants to improve security at the edge of the network and allow routing protocols to communicate without any additional configuration. What firewall mode meets the design requirements?

  A. routed
  B. zoned C. context
  D. transparent
  D. transparent

• Question 126:

  Which IPv4 multicast technical component measure provides architectural security?

  A. IGMP max groups
  B. access lists
  C. scoped addresses
  D. state limit
  C. scoped addresses

• Question 127:

  In base e-Commerce module designs, where should firewall perimeters be placed?

  A. core layer
  B. Internet boundary
  C. aggregation layer
  D. aggregation and core layers
  E. access and aggregation layers
  A. core layer

• Question 128:

  Which of the following is a recommended practice of a data center core?

  A. Server-to-server traffic always remains in the core layer.
  B. The core infrastructure should be in Layer 3.
  C. Core layer should run BGP along with an IGP because iBGP has a lower administrative distance than any IGP.
  D. The Cisco Express Forwarding hashing algorithm is the default, based on the IP address and Layer 4 port.
  B. The core infrastructure should be in Layer 3.

• Question 129:

  What are two advantages of a L2 looped data center design model? (Choose two.)

  A. promotes Layer 2 high availability
  B. prevents VLAN propagation
  C. allows sharing of service modules
  D. eliminates the use of STP
  E. improves data transfer speeds
  A. promotes Layer 2 high availability
  C. allows sharing of service modules

• Question 130:

  Which router type injects external LSAs into the OSPF database using either other routing protocols or static routes?

  A. backbone router
  B. ABR
  C. internal router
  D. designated router
  E. ASBR
  E. ASBR