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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

题目
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.

相似考题

1.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

2.Router VE1 has just received a packet and needs to route it. What two actions must this router take in order to route incoming packets? (Choose two)A. Inspect the routing table to select the best path to the destination network addresses.B. Validate sources of routing information.C. Inspect the ARP table to verify a legitimate source MAC address for each packet.D. Identify the destination network address of each packet.E. Verify the receipt of routed packets by the next hop router.F. Identify the source network address of each packet.

3.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.

4.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．modemsB．routersC．switchesD．computers

更多“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?() ”相关问题

  • 第1题：

    The following configuration line was added to router R1 Access－list 101 permit ip 10.25.30.00.0.0.255 any What is the effect of this access list configuration?()

    A.ermit all packet smatching the first three octets of the source address to all destinations

    B.permit all packet matching the last octet of the destination address and accept all source addresses

    C.permit all packet matching the host bits in the source address to all destinations

    D.permit all packet from the third subnet of the network address to all destinations


    参考答案：A

  • 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：

    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4题：

    An internet is a combination of networks connected by (1). When a datagram goes from a source to a (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a (4) 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 (5) is the optimum pathway? 空白（2）处应选择（）

    • A、user
    • B、host
    • C、city
    • D、destination

    正确答案:D

  • 第5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.

    正确答案:A

  • 第6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.

    正确答案:C

  • 第7题：

    When an SRX series device receives an ESP packet, what happens?（）

    • A、If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, it will
    • B、If the destination IP address in the outer IP header of ESP does not match the IP address of the ingress interface, it will
    • C、If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based packet.
    • D、If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based of inner header, it will decrypt the packet.

    正确答案:C

  • 第8题：

    单选题
    The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.00.0.0.255 any What is the effect of this access list configuration?（）
    A

    ermit all packet smatching the first three octets of the source address to all destinations

    B

    permit all packet matching the last octet of the destination address and accept all source addresses

    C

    permit all packet matching the host bits in the source address to all destinations

    D

    permit all packet from the third subnet of the network address to all destinations


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.00.0.0.255 any What is the effect of this access list configuration？（）
    A

    ermit all packets matching the first three octets of the source address to all destinations

    B

    permit all packet matching the last octet of the destination address and accept all source addresses

    C

    permit all packet matching the host bits in the source address to all destinations

    D

    permit all packet from the third subnet of the network address to all destinations


    正确答案： D
    解析： 暂无解析

  • 第10题：

    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.


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    A router receives an IPv6 packet which is 2000 bytes in length. The MTU of the outgoing interface is 1500 bytes. What action will the router take？（）
    A

    forwards the packet

    B

    fragments the packet

    C

    drops the packet silently

    D

    drops the packet and sends an ICMP message


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    A router receives an IPv6 packet which is 2000 bytes in length. The MTU of the outgoing interface is 1500 bytes. Which action will the router take?（）
    A

    Forward the packet.

    B

    Fragment the packet.

    C

    Drop the packet silently.

    D

    Drop the packet and send an ICMPv6 message.


    正确答案： A
    解析： 暂无解析

  • 第13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14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15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16题：

    An internet is a combination of networks connected by (1). When a datagram goes from a source to a (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a (4) 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 (5) is the optimum pathway? 空白（4）处应选择（）

    • A、destination
    • B、resource
    • C、packet
    • D、source

    正确答案:C

  • 第17题：

    给了两段documentation里的描述，问这个时候发哪种类型的ICMP包。 The interface on which the packet comes into the router is the same interface on which the packet gets routed out. The subnet or network of the source IP address is on the same subnet or network of the next-hop IP address of the routed packet.


    正确答案:ICMP类型5重定向消息。

  • 第18题：

    What field in IP packet is prevent the packet from a route to router forever？


    正确答案:TTL （time to live）.

  • 第19题：

    单选题
    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
    解析： 暂无解析

  • 第20题：

    多选题
    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
    解析： 暂无解析

  • 第21题：

    单选题
    When an SRX series device receives an ESP packet, what happens?（）
    A

    If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, it will

    B

    If the destination IP address in the outer IP header of ESP does not match the IP address of the ingress interface, it will

    C

    If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based packet.

    D

    If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based of inner header, it will decrypt the packet.


    正确答案： D
    解析： 暂无解析

  • 第22题：

    问答题
    给了两段documentation里的描述，问这个时候发哪种类型的ICMP包。 The interface on which the packet comes into the router is the same interface on which the packet gets routed out. The subnet or network of the source IP address is on the same subnet or network of the next-hop IP address of the routed packet.

    正确答案： ICMP类型5重定向消息。
    解析： 暂无解析

  • 第23题：

    单选题
    An internet is a combination of networks connected by (1). When a datagram goes from a source to a (2), it will probably pass many (3) until it reaches the router attached to the destination network. A router receives a (4) 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 (5) is the optimum pathway? 空白（4）处应选择（）
    A

    destination

    B

    resource

    C

    packet

    D

    source


    正确答案： B
    解析： 互联网是由不同的网络通过路由器互联起来的。当数据包从源地发往目的地时，在到达目的地网络之前它可能经过多个路由器。路由器从一个网络接收到数据包之后就转发到另外一个网络。然而，一个路由器往往与几个网络连接，当路由器接收到一个数据时，它应该将数据包传向哪个网络呢？这将基于路径最优化决策。

  • 第24题：

    单选题
    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.


    正确答案： B
    解析： 暂无解析

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