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An ERX Edge Router is operating in an MPLS network using interface label space.What is used to make a forwarding decision?（）A、EXP bitsB、VPI / VCIC、shim headerD、SNAP header

题目

An ERX Edge Router is operating in an MPLS network using interface label space.What is used to make a forwarding decision?（）

  • A、EXP bits
  • B、VPI / VCI
  • C、shim header
  • D、SNAP header
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相似问题和答案

第1题：

What is the default Quality of Service traffic class used by the ERX Edge Router?()

A. bronze forwarding

B. assured forwarding

C. expedited forwarding

D. best effort forwarding


参考答案：D

第2题：

A router receives a packet from a neighbor with an MPLS shim header value of 0.What does the router do with this packet?()

A. It performs a label pop operation and an IP lookup.

B. It performs a label swap operation and an IP lookup.

C. It sends an error message toward the egress router.

D. It sends an error message toward the ingress router.


参考答案：A

第3题：

A user is connected on a DSL line and is using a PPP over Ethernet service. Which network device encapsulates the datagram inside of an ATM header?()

A.DSLAM

B.DSL modem

C.ERX Edge Router

D.customer workstation


参考答案：B

第4题：

Which protocol is used to transfer files to on the ERX Edge Router?()

A.SCP

B.FTP

C.RCP

D.TFTP


参考答案：B, D

第5题：

A user is connected on a DSL line and is using a PPP over Ethernet service.Which network device strips the ATM header from the datagram and investigates the PPP header?()

A.DSLAM

B.DSL modem

C.ERX Edge Router

D.customer workstation


参考答案：C

第6题：

An ERX Edge Router is operating in an MPLS network using interface label space.What is used to make a forwarding decision?()

A. EXP bits

B. VPI / VCI

C. shim header

D. SNAP header


参考答案：B

第7题：

In a Bridged 1483 network, what Layer 2 encapsulations are passed between the DSL bridge and the ERX?()

A. single ATM header

B. single Ethernet header

C. ATM header followed by a PPP header

D. ATM header followed by an Ethernet header


参考答案：D

第8题：

Which configuration command allows the ERX Edge Router to perform Unicast Reverse Path Forwarding lookups on all packets received on an IP interface?()

A. ip sa-validate

B. ip split-horizon

C. ip access-routes

D. ip filter-options


参考答案：A

第9题：

Which command is used on the local router to invoke a loopback mode on a remote ERX Edge Router?()

A.A

B.B

C.C

D.D


参考答案：B

第10题：

Which four of these are MPLS label header fields？ （）

  • A、Label
  • B、VPI VCI
  • C、EXP
  • D、TTL
  • E、FCS
  • F、S flag

正确答案:A,C,D,F

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