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Two BGP peers connected through a routed firewall are unable

题目
单选题
Two BGP peers connected through a routed firewall are unable to establish a peering relationship. What could be the most likely cause？ （）
A

 BGP peers must be Layer 2-adjacent

B

 EBGP multihop is not configured

C

 The firewall is not configured to allow IP protocol 89

D

 The firewall is not configured to allow UDP 179.

参考答案和解析
正确答案： A
解析： 暂无解析
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相似问题和答案

第1题：

Which two characteristics are true of a firewall running in routed mode based on the following information?()

A. FWSM routes traffic between the VLANs.

B. FWSM switches traffic between the VLANs.

C. Routed mode is often called bump-in-the-wire mode.

D. Routed mode firewall deployments are used most often in current designs.


参考答案：A, D

第2题：

Which three statements about firewall modes are correct？ （）

  • A、 A firewall in routed mode has one IP address
  • B、 A firewall in transparent mode has one IP address
  • C、 In routed mode， the firewall is considered to be a Layer 2 dew
  • D、 In routed mode， the firewall is considered to be a Layer 3 device
  • E、 In transparent mode， the firewall is considered to be a Layer 2 device
  • F、 In transparent mode， the firewall is considered to be a Layer 3 device

正确答案:A,D,E

第3题：

You receive an EBGP route configured with the no－export community set.To which types of peers can you send this route?() (Choose two.)

A. no BGP peers

B. all I-BGP peers

C. all E-BGP peers within your global AS

D. all E-BGP peers outside your global AS


参考答案：B, C

第4题：

Which two statements accurately describe an IBGP peering session?（） (Choose two.)

  • A、Peers are statically defined.
  • B、Peers exist within the same AS.
  • C、Peers must be directly connected to each other.
  • D、Peers advertise routes learned from other IBGP neighbors.

正确答案:A,B

第5题：

Which two statements are true regarding firewall user authentication?（） (Choose two.)

  • A、When configured for pass-through firewall user authentication, the user must first open a connection to the Junos security remote network resource.
  • B、When configured for Web firewall user authentication only, the user must first open a connection to the Junos security remote network resource.
  • C、If a Junos security device is configured for pass-through firewall user authentication, new sessions are automatically intercepted .
  • D、If a Junos security device is configured for Web firewall user authentication, new sessions are automatically intercepted.

正确答案:B,C

第6题：

Which of the following describe private IP addresses (Choose two.)()。

A.addresses chosen by a company to communicate with the Internet

B.addresses that cannot be routed through the public Internet

C.addresses that can be routed through the public Internet

D.a scheme to conserve public addresses

E.addresses licensed to enterprises or ISPs by an Internet registry organization


参考答案：B, D

第7题：

Which two statements are correct about firewall filters in the Junos OS?（）

  • A、Firewall filters are stateless.
  • B、Firewall filters are used to control routing information that is exchanged between devices.
  • C、Firewall filters are used to control traffic passing through the device.
  • D、Firewall filters can only be applied to traffic entering the device.

正确答案:A,C

第8题：

Which two statements accurately describe an IBGP peering session?() (Choose two.)

A. Peers are statically defined.

B. Peers exist within the same AS.

C. Peers must be directly connected to each other.

D. Peers advertise routes learned from other IBGP neighbors.


参考答案：A, B

第9题：

Which two traffic types trigger pass-through firewall user authentication？（）

  • A、SSH
  • B、Telnet
  • C、ICMP
  • D、OSPF
  • E、HTTP

正确答案:B,E

第10题：

Two routers configured to run BGP have been connected to a firewall， one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer， including the correct BGP session endpoint addresses and the correct BGP session hop-count limit （EBGP multihop）. What is a good first test to see if BGP will work across the firewall？（）

  • A、Attempt to TELNET from the router connected to the inside of the firewall to the router connected to the outside of the firewall. If telnet works， BGP will work， since telnet and BGP both use TCP to transport data.
  • B、Ping from the router connected to the inside interface of the firewall to the router connected to the outside interface of the firewall. If you can ping between them， BGP should work， since BGP uses IP to transport packets.
  • C、There is no way to make BGP work across a firewall without special configuration， so there is no simple test that will show you if BGP will work or not， other than trying to start the peering session.
  • D、There is no way to make BGP work across a firewall.

正确答案:A

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