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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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更多 “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.” 相关考题
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
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
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 interfaceB. When routing the packet, matching a route whose outgoing interface is the GRE tunnel interfaceC. When routing the packet, matching a route whose outgoing interface is the IPsec tunnel interfaceD. When permitted by an ACL that was referenced in the associated crypto map
考题
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.
考题
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.
考题
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
考题
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 interfaceB、the time it takes for a propagate from source to destinationC、the time it takes to place a frame on the physical medium for transportD、the time a packet resides in the outbound queue of a router
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
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 entiretyB、the voice packet will be transmitted first， followed by the fragmented FTP packetC、the FTP packet will be fragmented and the voice packet will be interleavedD、the FTP packet will be transmitted first in its entirety， follow by the voice packet
考题
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.
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
Overlay Transport Virtualization （OTV） overlay interface is a logical multiaccess and multicast- capable interface that must be explicitly defined by the user and where the entire OTV configuration is applied. Which statements are true about OTV overlay interface？（）A、 When an OTV edge device receives a Layer 2 frame destined for a remote data center site， the frame is logically forwarded to the overlay interface.B、 The OTV edge device performs the dynamic OTV encapsulation on the Layer 2 packet and sends it to the join interface toward the routed domain.C、 When the OTV edge device receives a Layer 2 frame destined for a remote data center site， the frame is logically forwarded to the join interface.D、 The OTV edge device performs the dynamic OTV encapsulation on the Layer 2 packet and sends it to the overlay interface toward the routed domain.
考题
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 a broadcast addressB、The Ehernet interface is faultyC、VLSM-capable routing protocols must be enable first on the router.D、This address is a network address.
考题
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.
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
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 willB、If the destination IP address in the outer IP header of ESP does not match the IP address of the ingress interface, it willC、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.
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 willB
If the destination IP address in the outer IP header of ESP does not match the IP address of the ingress interface, it willC
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.
考题
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.
考题
单选题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 entiretyB
the voice packet will be transmitted first， followed by the fragmented FTP packetC
the FTP packet will be fragmented and the voice packet will be interleavedD
the FTP packet will be transmitted first in its entirety， follow by the voice packet
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. 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
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 interfaceB
When routing the packet, matching a route whose outgoing interface is the GRE tunnel interfaceC
When routing the packet, matching a route whose outgoing interface is the IPsec tunnel interfaceD
When permitted by an ACL that was referenced in the associated crypto map
考题
单选题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 interfaceB
the time it takes for a propagate from source to destinationC
the time it takes to place a frame on the physical medium for transportD
the time a packet resides in the outbound queue of a router
考题
单选题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 a broadcast addressB
The Ehernet interface is faultyC
VLSM-capable routing protocols must be enable first on the router.D
This address is a network address.
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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