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A router receives a packet on interface 172.16.45.66/26. The

题目
单选题
A router receives a packet on interface 172.16.45.66/26. The source IP of the packet is 172.16.45.127/26 and the destination is 172.16.46.191/26.How will the router handle the packet?（）
A

The destination is a host on another subnet, so the router will not forward the packet.

B

The destination is a host on the same subnet, so the router will forward the packet.

C

The destination is a broadcast address, so the router will not forward the packet.

D

The destination is a network address, so the router will forward the packet.

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相似问题和答案

第1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2题：

Refer to the exhibit. What does the (*) represent in the output?()

A.Packet is destined for a local interface to the router.

B.Packet was translated, but no response was received from the distant device.

C.Packet was not translated, because no additional ports are available.

D.Packet was translated and fast switched to the destination.


参考答案：D

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：

Refer to the exhibit. A router has a 256 kbps Frame Relay circuit connected to interface serial 0/0. As a large FTP packet is being placed into the hardware transmit queue of interface serial 0/0， a voice packet is placed into the priority queue of that interface. How， and in what order， wi the packets be transmitted？（）

  • A、the voice packet will be transmitted first， followed by the FTP packet in its entirety
  • B、the voice packet will be transmitted first， followed by the fragmented FTP packet
  • C、the FTP packet will be fragmented and the voice packet will be interleaved
  • D、the FTP packet will be transmitted first in its entirety， follow by the voice packet

正确答案:D

第5题：

What is the best description of serialization delay？ （）

  • A、the time it takes for a Layer 3 switch or a router to switch a packet from an inbound interface to the queue of the outbound interface
  • B、the time it takes for a propagate from source to destination
  • C、the time it takes to place a frame on the physical medium for transport
  • D、the time a packet resides in the outbound queue of a router

正确答案:C

第6题：

Refer to the exhibit. What will Router1 do when it receives the data frame shown?()

A.Router1 will strip off the source MAC address and replace it with the MAC address 0000.0c36.6965.

B.Router1 will strip off the source IP address and replace it with the IP address 192.168.40.1.

C.Router1 will strip off the destination MAC address and replace it with the MAC address 0000.0c07.4320.

D. Router1 will strip off the destination IP address and replace it with the IP address of 192.168.40.1.

E.Router1 will forward the data packet out interface FastEthernet0/1.

F.Router1 will forward the data packet out interface FastEthernet0/2.


参考答案：A, C, F

第7题：

Anytime a host or a router has an IP datagram to send to another host or router, it has the（　）address of the receiver. This address is obtained from the DNS if the sender is the host or it is found in a routing table if the sender is a router. But the IP data gram must be（　） in a frame to be able to pass through the physical network. This means that the sender needs the （　）address of the receiver. The host or the router sends an ARP query packet. The packet includes the physical and IP addresses of the sender and the IP address of the receiver. Because the sender does not know the physical address of the receiver, the query is（　） over the network.Every host or router on the network receives and processes the ARP query packet, but only the intended recipient recognizes its IP address and sends back an ARP response packet.The response packet contains the recipient's IP and physical addresses. The packet is（请作答此空） directly to the inquirer by using the physical address received in the query packet.

A. multicast
B. unicast
C. broadcast
D. multiple unicast

答案：B
解析：
任何时候主机或路由器要发送 IP 数据报发送给另一主机或路由器时，都需要知道接收方的逻辑地址。发送主机从 DNS 获得该地址，发送路由器则在路由表中找到该地址。但 IP 数据报必须封装在帧中才能通过物理网络。这意味着发送者需要知道接收者的物理地址。主机或路由器需发送 ARP 查询报文，该报文分组包含发送者的物理地址和 IP 地址及接收者的 IP 地址。这是因为送者不知道接收者的物理地址，所以需在全网广播报文。网络上的每个主机或路由器都能接收并处理该 ARP 查询报文，但只有预期的接收者识别其 IP 地址并响应该 ARP 报文。响应报文包含接收者的 IP 地址和物理地址。包含了接收者物理地址的响应报文分组通过单播的方式直接发送给发送者。

第8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9题：

How does an IPv6 router deal with a packet that is larger than the outgoing interface MTU？（）

  • A、It will fragment the packet at Layer 2.
  • B、It will fragment the packet at Layer 3.
  • C、It will drop the packet and send an ICMPv6 message "packet too big" back to the source.
  • D、It will drop the packet.

正确答案:C

第10题：

A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24/29. which statement explains the reason for this issue？（）

  • A、The address is abroadcast address.
  • B、The Ehernet interface is faulty.
  • C、VLSM-capable routing protocols must be enable first on the router.
  • D、This address is a network address.

正确答案:D

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