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If the router R1 has a packet with a destination address 192.168.1.255, what describes the operation of the network()。
A.R1 will forward the packet out all interfaces.
B.R1 will drop this packet because this it is not a valid IP address.
C.As R1 forwards the frame containing this packet, Sw-A will add 192.168.1.255 to its MAC table.
D.R1 will encapsulate the packet in a frame with a destination MAC address of FF-FF-FF-FF-FF-FF
E.As R1 forwards the frame containing this packet, Sw-A will forward it to the device assigned the IP address of 192.168.1.255.
参考答案
更多 “ If the router R1 has a packet with a destination address 192.168.1.255, what describes the operation of the network()。 A.R1 will forward the packet out all interfaces.B.R1 will drop this packet because this it is not a valid IP address.C.As R1 forwards the frame containing this packet, Sw-A will add 192.168.1.255 to its MAC table.D.R1 will encapsulate the packet in a frame with a destination MAC address of FF-FF-FF-FF-FF-FFE.As R1 forwards the frame containing this packet, Sw-A will forward it to the device assigned the IP address of 192.168.1.255. ” 相关考题
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Refer to the exhibit. Network 10.0.0.0／8 is being advertised to autonomous system 65550 via both external links. Which statement about the preferred path to the 10.0.0.0／8 network is true? ()
A. Router R2 will be preferred because it has the higher neighbor IP address.B. Router R2 will be preferr ed because its neighbor has a lower autonomous system number.C. Router R1 will be preferred because it has a lower local preference.D. Router R2 will be preferred because it has a higher local preference.E. Router R1 will be preferred because its nei ghbor has the higher autonomous system number.F. Router R1 will be preferred because it has the lower neighbor IP address.
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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?()
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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.
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Traditional network layer packet forwarding relies on the information provided by network layer （） protocols, or static routing, to make an independent （本题）decision at each hop within the network. The forwarding （）is based solely on the destination （）IP address. All packets for the same destination follow the same path across the network if no other equal-cost paths exist. Whenever a router has two equal-cost （）toward a destination, the packets toward the destination might take one or both of them, resulting in some degree of load sharing.A.switch
B.hop
C.host
D.cunstomer
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We have already covered the topic of network addresses. The first（） 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.A.datagram
B.function
C.address
D.service
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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.
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B.multicast
C.broadcast
D.anycast
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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.source
B.destination
C.local
D.remote
考题
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C.huB.
D.firewall
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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
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Traditional IP packet forwarding analyzes the（ ）IP address contained in the network layer header of each packet as the packet travels from its source to its final destination.A router analyzes the destination IP address independently at each hop in the network.Dynamic（ ）protocols or static configuration builds the database needed to analyze the destination IP address（the routing table）.The process of implementing traditional IP routing also is called hop-by-hop destination-based（ ）routing.Although successful，and obviously widely deployed，certain restrictions，which have been realized for some time，exist for this method of packet forwarding that diminish is（请作答此空）.New techniques are therefore required to address and expand the functionality of an IP-based network infrastructure.This first chapter concentrates on identifying these restrictions and presents a new archiecture，known as multiprotocol（ ）switching，that provides solutions some of these restrictions.
A.reliability
B.flexibility
C.stability
D.capability
考题
What is the purpose using the traceroute command?（）A、to map all the devices on a network.B、to display the current TCP/IP configuration values.C、to see how a device MAC address is mapped to its IP address.D、to see the path a packet will take when traveling to a specified destination.E、to display the MTU values for each router in a specified network path from source to a destination.
考题
What must be configured on the network in order for users on the Internet to view web pages located on Web Server 2?（）A、On router R2， configure a default static route to the 192.168.1.0 network.B、On router R2， configure DNS to resolve the URL assigned to Web Server 2 to the 192.168.1.10 address.C、On router R1， configure NAT to translate an address on the 209.165.100.0/24 network to 192.168.1.10.D、On router R1， configure DHCP to assign a registered IP address on the 209.165.100.0/24 network to Web Server 2.
考题
The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.0 0.0.0.255 any What is the effect of this access list configuration?（）A、permit all packets matching the first three octets of the source address to all destinationsB、permit all packet matching the last octet of the destination address and accept all source addressesC、permit all packet matching the host bits in the source address to all destinationsD、permit all packet from the third subnet of the network address to all destinations
考题
If the router R1 has a packet with a destination address 192.168.1.255, what describes the operation of the network（）。A、R1 will forward the packet out all interfaces.B、R1 will drop this packet because this it is not a valid IP address.C、As R1 forwards the frame containing this packet, Sw-A will add 192.168.1.255 to its MAC table.D、R1 will encapsulate the packet in a frame with a destination MAC address of FF-FF-FF-FF-FF-FFE、As R1 forwards the frame containing this packet, Sw-A will forward it to the device assigned the IP address of 192.168.1.255.
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
What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is inactive status?（）A、It routes all traffic that is addresses to the destination network to the interface indicates in the routing table.B、It sends a copy of its neighbor table to all adjacent routers.C、It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.D、It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.
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What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is inactive status?（）A
It routes all traffic that is addresses to the destination network to the interface indicates in the routing table.B
It sends a copy of its neighbor table to all adjacent routers.C
It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.D
It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.
考题
单选题What is the purpose using the traceroute command?（）A
to map all the devices on a network.B
to display the current TCP/IP configuration values.C
to see how a device MAC address is mapped to its IP address.D
to see the path a packet will take when traveling to a specified destination.E
to display the MTU values for each router in a specified network path from source to a destination.
考题
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 destinationsB
permit all packet matching the last octet of the destination address and accept all source addressesC
permit all packet matching the host bits in the source address to all destinationsD
permit all packet from the third subnet of the network address to all destinations
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
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R1 forwards a packet from Host 1 to remote Server 1. Which statement describes the use of a MAC as the frame carrying this packet leaves the s0/0/0 interface of R1（）。A
The frame does not have MAC addresses.B
The source MAC address in the frame is the MAC address of the NIC of Host 1.C
The source MAC address in the frame is the MAC address of the s0/0/0 interface of R1.D
The destination MAC address in the frame is the MAC address of the NICof server 1.E
The destination MAC address in the frame is the MAC address of the s0/0/0 interface of R2
考题
单选题What must be configured on the network in order for users on the Internet to view web pages located on Web Server 2?（）A
On router R2， configure a default static route to the 192.168.1.0 network.B
On router R2， configure DNS to resolve the URL assigned to Web Server 2 to the 192.168.1.10 address.C
On router R1， configure NAT to translate an address on the 209.165.100.0/24 network to 192.168.1.10.D
On router R1， configure DHCP to assign a registered IP address on the 209.165.100.0/24 network to Web Server 2.
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