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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
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更多 “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 packetB fragments the packetC drops the packet silentlyD drops the packet and sends an ICMP message” 相关考题
考题
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 routers 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 routers 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
考题
● 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?（71）A. modemsB. routersC. switchesD. computers（72）A. userB. hostC. cityD. destination（73）A. destinationsB. routersC. packetsD. computers（74）A. destinationB. resourceC. packetD. source（75）A. pathwaysB. routersC. diagramsD. calls
考题
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．modemsB．routersC．switchesD．computers
考题
For which network anomaly does Junos provide a SCREEN?()
A. a telnet to port 80B. a TCP packet with the SYN and ACK flags setC. an SNMP getnext requestD. an ICMP packet larger than 1024 bytes
考题
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.
考题
Which command enables OSPF for IPv6?()
A. router ospf ipv6 process - idB. ipv6 ospf process - idC. router ospf process - idD. ipv6 router ospf process - id
考题
Which command enables OSPF for IPv6?（）A、router ospf ipv6 process - idB、ipv6 ospf process - idC、router ospf process - idD、ipv6 router ospf process - id
考题
Which of the following statements about authentication responses and conditions is true? （）(Choosetwo.)A、When a router receives a failure response, it stops querying authentication methods.B、When a router receives an error response, it stops querying authentication methods.C、If the router receives a failure response from an authentication method, it queries the next method.D、The router does not differentiate between failure and error responses; the authentication process is always interrupted.E、If it receives no response from the authentication method, a router will determine the error condition On its own; the router also has the option to proceed to the next method in a list if configured accordingly.
考题
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.
考题
Which action does the ping 172.18.1.1 size 5 command perform?（）A、It sends only five ping requests to the 172.18.1.1 destination.B、It sends a continuous ping with a packet length of five bytes to the 172.18.1.1 destination.C、It sends five rapid ping requests to the 172.18.1.1 destination.D、It sends a continuous rapid ping with a packet length of five bytes to the 172.18.1.1 destination.
考题
For which network anomaly does Junos provide a SCREEN?（）A、a telnet to port 80B、a TCP packet with the SYN and ACK flags setC、an SNMP getnext requestD、an ICMP packet larger than 1024 bytes
考题
A traditional router is better suited than a firewall device for which function？（）A、VPN establishmentB、packet-based forwardingC、stateful packet processingD、Network Address Translation
考题
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.
考题
Which command enables IPv6 forwarding on a cisco router?（）A、ipv6 hostB、ipv6 unicast-routingC、ipv6 localD、ipv6 neighbor
考题
Which three causes could prevent a host from getting an IPv6 address with stateless autoconfiguration？（）A、The autoconfig command is missing from the router interface.B、IPv6 multicast routing is not enabled on the router interface.C、IPv6 unicast routing is not enabled on the router interface.D、The router interface is configured with a /63 mask.E、The router interface is configured with a /65 mask.
考题
Which of the following statements about authentication responses and conditions is true?（）(Choose two.)A、When a router receives a failure response, it stops querying authentication methods.B、When a router receives an error response, it stops querying authentication methods.C、If the router receives a failure response from an authentication method, it queries the next method.D、The router does not differentiate between failure and error responses; the authentication process is always interrupted.E、If it receives no response from the authentication method, a router will determine the error condition on its own; the router also has the option to proceed to the next method in a list if configured accordingly.
考题
Which of the following describe router functions?（）A、Packet switchingB、Collision prevention on a LAN segmentC、Packet filteringD、Broadcast domain enlargementE、Broadcast forwardingF、Internetwork communication
考题
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.
考题
Which mechanism does OSPFv3 use when the router LSA is too big to be sent out？（）A、It relies on IPv6 to do the fragmenting.B、It splits the LS Update packet into smaller packets.C、It splits the LSA into smaller router LSA packets.D、It produces an error.
考题
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.
考题
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.
考题
单选题For which network anomaly does Junos provide a SCREEN?（）A
a telnet to port 80B
a TCP packet with the SYN and ACK flags setC
an SNMP getnext requestD
an ICMP packet larger than 1024 bytes
考题
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
destinationB
resourceC
packetD
source
考题
单选题Which ERX Edge Router component is responsible for all packet processing and packet forwarding？（）A
I/O adapterB
line moduleC
shared memory fabricD
switch route processor
考题
单选题Which mechanism does OSPFv3 use when the router LSA is too big to be sent out？（）A
It relies on IPv6 to do the fragmenting.B
It splits the LS Update packet into smaller packets.C
It splits the LSA into smaller router LSA packets.D
It produces an error.
考题
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.
考题
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.
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