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单选题When does the E-series router start monitoring DHCP traffic using the DHCP External function?（）A When the discovery packet enters the router from the DHCP client.B Only when the offer packet enters the router from the DHCP server.C When the acknowledge

题目
单选题
When does the E-series router start monitoring DHCP traffic using the DHCP External function?（）
A

When the discovery packet enters the router from the DHCP client.

B

Only when the offer packet enters the router from the DHCP server.

C

When the acknowledge packet enters the router from the DHCP server.

D

Only when the discovery packet leaves the router going to the DHCP server.

参考答案和解析
正确答案： D
解析： 暂无解析
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相似问题和答案

第1题：

When controlling the virtual router assignment for a PPP over ATM client, which mechanism does the router use first?()

A. profile

B. domain map

C. DHCP server

D. RADIUS server


参考答案：B

第2题：

Which CLI command enables the DHCP External Server function on an E－series router?()

A. service dhcp-external

B. set dhcp external server

C. set dhcp-external server

D. dhcp external server


参考答案：A

第3题：

An internet is a combination of networks connected by (71) .When a datagram goes from a source to a (72) ，it will probably pass many (73) until it reaches the router attached to the destination network．A router receives a (74) from a network and passes it to another network．A router is usually attached to several networks．When it receives a packet，to which network should it pass the packet? The decision is based on optimization： Which of the available (75) is the optimum pathway?

A．modems

B．routers

C．switches

D．computers


正确答案：B

第4题：

In what situation would the command ip helper-address be required？（Choose the best answer.）（）

  • A、Only when there is a duplicate IP address caused by a combination of static and dynamic IPaddress allocations
  • B、On each router that exists between the client and the server
  • C、Only when a router separates the client from the server
  • D、Only if the DHCP sever issues a DHCPNAK to the initial request
  • E、Only when the client is on the same subnet as the server
  • F、Only when the DHCP pool is out of IP addresses

正确答案:C

第5题：

How does the ERX Edge Router interact with an external DHCP server in a Bridged 1483 network?()

A.It maintains DHCP leases on behalf of subscribers.

B.It initiates DHCP requests on behalf of subscribers.

C.It passes DHCP traffic to and from the server;you must configure static host routes.

D.It passes DHCP traffic to and from the server and inserts host routes into its routing table.


参考答案：D

第6题：

When does the E－series router start monitoring DHCP traffic using the DHCP External function?()

A. When the discovery packet enters the router from the DHCP client.

B. Only when the offer packet enters the router from the DHCP server.

C. When the acknowledge packet enters the router from the DHCP server.

D. Only when the discovery packet leaves the router going to the DHCP server.


参考答案：D

第7题：

The ERX Edge Router in your Bridged 1483 network has multiple external DHCP servers configured.During discovery, which algorithm does the router use to decide which DHCP server to send packets to?()

A. direct mode

B. round robin

C. weighted round robin

D. No algorithm is used.


参考答案：D

第8题：

How does the ERX Edge Router interact with subscriber IP addresses assigned by an external DHCP server?()

A.It monitors messages from the external server and updates the routing table as needed.

B.It maintains the leases for the DHCP server and reassigns addresses to new subscribers.

C.It sends keep alives to the subscriber and makes the address available when the subscriber stops responding.

D.It sends keep alives to the subscriber and removes the host route when the subscriber stops responding.


参考答案：A

第9题：

Router R1, a branch router, connects to the Internet using DSL. Some traffic flows through a GRE and IPsec tunnel, over the DSL connection, destined for an Enterprise network.Which of the following answers best describes the router‘s logic that tells the router, for a given packet, to apply GRE encapsulation to the packet?（）

A. When the packet received on the LAN interface is permitted by the ACL listed on the tunnel greacl command under the incoming interface

B. When routing the packet, matching a route whose outgoing interface is the GRE tunnel interface

C. When routing the packet, matching a route whose outgoing interface is the IPsec tunnel interface

D. When permitted by an ACL that was referenced in the associated crypto map


参考答案：B

第10题：

Router R1, a branch router, connects to the Internet using DSL. Some traffic flows through a GRE and IPsec tunnel, over the DSL connection, destined for an Enterprise network. Which of the following answers best describes the router's logic that tells the router, for a given packet, to apply GRE encapsulation to the packet?（）

  • A、When the packet received on the LAN interface is permitted by the ACL listed on the tunnel greacl command under the incoming interface
  • B、When routing the packet, matching a route whose outgoing interface is the GRE tunnel interface
  • C、When routing the packet, matching a route whose outgoing interface is the IPsec tunnel interface
  • D、When permitted by an ACL that was referenced in the associated crypto map

正确答案:B

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