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多选题Firewall filters can perform which two actions？（）ALog packet.BCount packet.CSet packet metric.DDecrement packet TTL.EChange destination IP address.

题目
多选题
Firewall filters can perform which two actions？（）
A

Log packet.

B

Count packet.

C

Set packet metric.

D

Decrement packet TTL.

E

Change destination IP address.

参考答案和解析
正确答案： E,D
解析： 暂无解析
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相似问题和答案

第1题：

The typical firewall consists of two packet filters and a(an)(68).

A．router

B．bridge

C．application

D．server


正确答案：C
解析：译文：典型的防火墙包含两个包过滤器和一个______应用程序______?

第2题：

Firewall filter policers can perform which two actions?()

A. Set the next hop.

B. Discard packets.

C. Set loss priority.

D. Sample packet content.


参考答案：B, C

第3题：

●The typical firewall consists of two packet filters and a (an) (68) ．

(68) A．router

B．bridge

C．application

D．server


正确答案：C
【解析】译文：典型的防火墙包含两个包过滤器和一个应用程序?

第4题：

If an edge Label Switch Router （LSR） is properly configured，which three combinations are possible？（）

  • A、A received IP packet is forwarded based on the IP destination address and the packet is sent as an IP packet.
  • B、An IP destination exists in the IP forwarding table. A received labeled packet is dropped because the label is not found in the LFIB table.
  • C、There is an MPLS label-switched path toward the destination. A received IP packet is dropped because the destination is not found in the IP forwarding table.
  • D、A received IP packet is forwarded based on the IP destination address and the packet is sent as a labeled packet.
  • E、A received labeled IP packet is forwarded based upon both the label and the IP address.
  • F、A received labeled packet is forwarded based on the label. After the label is swapped，the newly labeled packet is sent.

正确答案:A,D,F

第5题：

●We have already covered the topic of network addresses. The first(71) in a block (in classes A,B,and C) defines the network address. In classes A,B,and C,if the hostid is all ls, the address is called a direct broadcast address. It is used by a (72) to send a packet to all hosts in a specific network. All hosts will accept a packet having this type of destination address. Note that this address can be used only as a (73)address in an lP packet. Note also that this special address also reduces the number of available hostid for each netid in classes A,B,and C.

In classes A,B,and C,an address with all Is for the netid and hostid (32 bits) defines a( 74) address in the current network.A host that wants to send a message to every other host can use this address as a destination address in an IP packet. However,a router will block a packet having this type ofaddress to confine the broadcasting to the (75) network. Note that this address belongs to class E.

(71) A.datagram

B.function

C.address

D.service

(72) A.router

B.switch

C.hub

D.firewall

(73)A.source

B.destination

C.local

D.remote

(74) A.unicast

B.multicast

C.broadcast

D.anycast

(75) A.neighbor

B.next

C.remote

D.local


正确答案：C,A,B,C,D

第6题：

Which two packet attributes contribute to the identification of a session? ()(Choose two.)

A. destination port

B. TTL

C. IP options

D. protocol number


参考答案：A, D

第7题：

Which two firewall filter actions will terminate the processing and evaluation of a packet?()

A. permit

B. accept

C. deny

D. discard


参考答案：B, D

第8题：

阅读下面的短文，回答问题 [When an IP packet arrives at a router, generally the router looks at the destination address of the packet, and forwards the packet to one of its network interfaces. The forwarding decision is usually done by looking up the destination address from another data structure called a forwarding table. The forwarding table is created by the router using the routing table and possible routing policies existing in the router. The router then creates a table where it lists which networks are accessible through which of the router’s network interfaces. An IP router looks at every IP packet individually and does the forwarding decision on a packet-by-packet basis. If something changes in the router’s routing table, a packet can take a different route from a preceding packet even if it has the same destination.] From the paragraph above，we can see that the router （ ） a forwarding table according to the routing table and possible routing policies existing in the router. When an IP packet arrives at a router, the （ ） part of packet is normally checked by the router. An IP router checks every IP Packet individually and makes the forwarding decision based on （ ）.

A．is generating B．generate C．is generated D．generates A．forwarding table B．network interfaces C．routing policies D．destination address A．the destination address and network interfaces B．forwarding table and network interfaces C．the destination address and forward table D．routing policies and routing table


正确答案：D,D,C

第9题：

We have already covered the topic of network addresses. The first（71） in a block (in classes A,B,and C) defines the network address. In classes A,B,and C,if the hostid is all ls, the address is called a direct broadcast address. It is used by a.（） to send a packet to all hosts in a specific network. All hosts will accept a packet having this type of destination address. Note that this address can be used only as a （73）address in an lP packet. Note also that this special address also reduces the number of available hostid for each netid in classes A,B,and C.
In classes A,B,and C,an address with all Is for the netid and hostid (32 bits) defines a（74） address in the current network.A host that wants to send a message to every other host can use this address as a destination address in an IP packet. However,a router will block a packet having this type ofaddress to confine the broadcasting to the （75） network. Note that this address belongs to class E.

A.router
B.switch
C.huB.
D.firewall

答案：A
解析：

第10题：

What are two possible actions an IOS IPS can take if a packet in a session matches a signature？（）

  • A、reset the connection
  • B、forward the packet
  • C、check the packet against an ACL
  • D、drop the packet

正确答案:A,D

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