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Two routers configured to run BGP have been connected to a f

题目
单选题
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.

参考答案和解析
正确答案： C
解析： 暂无解析
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相似问题和答案

第1题：

Refer to the exhibit. On the basis of the output, what two conclusions can be reached?()

A. The default administrative distance has been changed.

B. IS - IS is not enabled.

C. Three physical interfaces are taking part in integrated IS - IS.

D. IS - IS is not redistributing any oth er routing protocols.

E. There are two neighboring routers sending IS - IS routing information.

F. Address summarization is configured.


参考答案：D, E

第2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.

正确答案:B

第3题：

Routers A and B are connected with a point-to-point OC-3 interface. Each router‘s OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in the same area.How many IS-IS adjacencies exist between the two routers?（）

A.0

B.1

C.2

D.3


参考答案：C

第4题：

Routers A and B are connected with a point-to-point OC-3 interface. Each routers OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in different areas. How many IS-IS adjacencies exist between the two routers?（）

  • A、0
  • B、1
  • C、2
  • D、3

正确答案:B

第5题：

A switch has been configured with two vlans and is connected to a router with a trunk for inter-vlan routing.OSPF has been configured on the router，as the routing protocol for the network.Which statement about thisnetwork is true？（）

  • A、For the two vlans to communicate，a network statement for the trunk interface needs to be added to the  OSPF configuration.
  • B、For the two vlans to communicate， a network statement for each subinterface needs to be  added  to the OSPF configuration.
  • C、Direct inter-vlan communication does not require OSPF
  • D、OSPF cannot be used if router-on-a-stick is configured on the router

正确答案:C

第6题：

Refer to the exhibit. When running EIGRP, What is required for RouterA to exchange routing updates with RouterC?（）

  • A、As numbers must be changed to match on all the routers.
  • B、Loopback interface must be configured so a DR is elected.
  • C、The no auto-summary command is needed on Router A and Router C.
  • D、Router B needs to have two network statements, one for each connected network.

正确答案:A

第7题：

In which of the following scenarios would the "show cdp neighbors detail"command be an appropriate troubleshooting tool?（）

  • A、Two switches are connected via a trunk. Both switches have been assigned an IP address, subnet mask, and default gateway. A ping is successful between the two switches. However, VLAN information is not passed from one switch to the other switch.
  • B、A router and a switch have been assigned an IP address, a subnet mask, and a default gateway. They are directly connected, but a ping between the two devices fails.
  • C、A router connects to another router through a serial interface. Both routers have been assigned an IP address, subnet mask, and default gateway. The routers are running RIP and the networks directly connected to the first router do not pass to the second router. However, a ping from one router to the serial interface of the directly connected neighboring router is successful.
  • D、A router connects to another router via a switch. Both routers and the switch have been assigned an IP address, subnet mask, and default gateway. Neither the routers nor the switch are able to ping one of the hosts that is directly to the switch.

正确答案:B

第8题：

Routers A and B are connected with a point-to-point OC-3 interface. Each routers OC-3 interface is configured for both Level 1 and Level 2. The routers are configured in different areas. How many IS-IS adjacencies exist between the two routers?（）

A.0

B.1

C.2

D.3


参考答案：B

第9题：

When BGP is used as the PE-CE routing protocol, which of these statements is correct?（）

  • A、On the CE router, PE neighbors must be configured in the VRF context on the CE router
  • B、On PE routers, the CE IBGP neighbors are configured in the global BGP configuration
  • C、On PE routers, the CE EBGP neighbors are configured in the VRF context
  • D、A separate BGP process must be used on the PE routers for CE routers so that they do not use the same BGP routing process as that used for the PE router's other provider neighbors

正确答案:C

第10题：

Which condition must be met to allow a PE router to forward VPN traffic across a LSP in a Layer 3 VPN environment？（）

  • A、The BGP next hop must be in inet.1.
  • B、The BGP next hop must be in inet.3.
  • C、Must have a bidirectional LSP configured.
  • D、Must have a static route to allow an RP for connected interfaces.

正确答案:B

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