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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
题目
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
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第1题：
What is the purpose of this command? ip route 0.0.0.0 0.0.0.0 serial0／0()A. It configures a router to send all packets out interface serial 0/0.
B. It configures a router to block routing updates from being sent out interface serial 0/0.
C. It configures a router as a firewall, blocking all unauthorized packets from exiting serial 0/0.
D. It configures a router to send all packets for unknown destination networks out interface serial 0/0.
E. It configures a router to drop all packets for which the destination network is unknown.
参考答案：D
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第2题：
Refer to the exhibit The neighbor 10.1.1.1 weight 200 BGP configuration command has been configured on router A. What will be the result of this configuration? ()
A. Router A will prefer the path through router B for network 172.20.0.0
B. Router A will prefer the path through router C for network 172.20.0.0
C. Packets from router D will prefer the path through router B for networks advertised by router A
D. Packets from r outer D will prefer the path through router C for networks advertised by router A
参考答案：A
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第3题：
The TTL field was originally designed to hold a time stamp, which was decremented by each visited router. The datagram was ( ) when the value became zero. However, for this scheme, all the machines must have synchronized clocks and must know how long it takes for a datagram to go from one machine to another. Today, this field is used mostly to control the ( ) number of hops (routers) visited by the datagram. When a source host sends the datagram, it (请作答此空) a number in this field. Each router that processes the datagram decrements this number by 1. If this value, after being decremented, is zero, the router discards the datagram.This field is needed because routing tables in the Internet can become corrupted.A datagram may travel between two or more routers for a long time without ever getting delivered to the ( ).This field limits the ( ) of a datagram.A.controls
B.transmits
C.stores
D.receives答案：C解析：TTL的基本概念。 -
第4题：
The TTL field was originally designed to hold a time stamp, which was decremented by each visited router. The datagram was ( ) when the value became zero. However, for this scheme, all the machines must have synchronized clocks and must know how long it takes for a datagram to go from one machine to another. Today, this field is used mostly to control the (请作答此空) number of hops (routers) visited by the datagram. When a source host sends the datagram, it ( ) a number in this field. Each router that processes the datagram decrements this number by 1. If this value, after being decremented, is zero, the router discards the datagram.This field is needed because routing tables in the Internet can become corrupted.A datagram may travel between two or more routers for a long time without ever getting delivered to the ( ).This field limits the ( ) of a datagram.A.maximum
B.minimum
C.exact
D.certain答案：A解析：TTL的基本概念。 -
第5题：
A customer wants to TFTP a new image from the corporate network to Flash on the Teleworker router through the IPSec tunnel. How should you configure the Teleworker router?（）
- A、No additional steps are required.
- B、Add the appropriate source-interface command.
- C、The router cannot access a server in the Enterprise Campus network.
- D、The Teleworker Router does not have any client applications; therefore this type of request is not possible.
正确答案:B -
第6题：
A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782.The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?（）
- A、Router R2 will not form a neighbor relationship with R1.
- B、Router R2 will obtain a full routing table, including a default route, from R1.
- C、R2 will obtain OSPF updates from R1, but will not obtain a default route from R1.
- D、R2 will not have a route for the directly connected serial network, but all other directly connected
正确答案:B -
第7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（1）处应选择（）
- A、modems
- B、routers
- C、switcher
- D、computers
正确答案:B -
第8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（3）处应选择（）
- A、destinations
- B、routers
- C、packets
- D、computers
正确答案:B -
第9题：
A router receives information about network 192.168.10.0/24 from multiple sources.What will the router consider the most reliable information about the path to that network?（）
- A、an OSPF update for network 192.168.0.0/16
- B、a static router to network 192.168.10.0/24
- C、a static router to network 192.168.10.0/24 with a local serial interface configured as the next hop
- D、a RIP update for network 192.168.10.0/24
- E、a directly connected interface with an address of 192.168.10.254/24
- F、a default route with a next hop address of 192.168.10.1
正确答案:E -
第10题：
A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?（）
- A、the OSPF route
- B、the EIGRP route
- C、the RIPv2 route
- D、all three routes
- E、the OSPF and RIPv2 routes
正确答案:B -
第11题：
单选题A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782.The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?（）ARouter R2 will not form a neighbor relationship with R1.
BRouter R2 will obtain a full routing table, including a default route, from R1.
CR2 will obtain OSPF updates from R1, but will not obtain a default route from R1.
DR2 will not have a route for the directly connected serial network, but all other directly connected
正确答案： C解析： 暂无解析 -
第12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（2）处应选择（）Auser
Bhost
Ccity
Ddestination
正确答案： D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13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.
参考答案：C
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第14题：
A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560. Another route is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?（）
A. the OSPF route
B. the EIGRP route
C. the RIPv2 route
D. all three routes
E. the OSPF and RIPv2 routes
参考答案：B
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第15题：
The TTL field was originally designed to hold a time stamp, which was decremented by each visited router. The datagram was ( ) when the value became zero. However, for this scheme, all the machines must have synchronized clocks and must know how long it takes for a datagram to go from one machine to another. Today, this field is used mostly to control the ( ) number of hops (routers) visited by the datagram. When a source host sends the datagram, it ( ) a number in this field. Each router that processes the datagram decrements this number by 1. If this value, after being decremented, is zero, the router discards the datagram.This field is needed because routing tables in the Internet can become corrupted.A datagram may travel between two or more routers for a long time without ever getting delivered to the (请作答此空).This field limits the ( ) of a datagram.A.switch
B.router
C.source host
D.destination host答案：D解析：TTL的基本概念。 -
第16题：
The TTL field was originally designed to hold a time stamp, which was decremented by each visited router. The datagram was ( ) when the value became zero. However, for this scheme, all the machines must have synchronized clocks and must know how long it takes for a datagram to go from one machine to another. Today, this field is used mostly to control the ( ) number of hops (routers) visited by the datagram. When a source host sends the datagram, it ( ) a number in this field. Each router that processes the datagram decrements this number by 1. If this value, after being decremented, is zero, the router discards the datagram.This field is needed because routing tables in the Internet can become corrupted.A datagram may travel between two or more routers for a long time without ever getting delivered to the ( ).This field limits the (请作答此空) of a datagram.A.lifetime
B.moving time
C.receiving time
D.transmitting time答案：A解析：TTL的基本概念。 -
第17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.
正确答案:A,E -
第18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19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（5）处应选择（）
- A、pathways
- B、routers
- C、diagrams
- D、calls
正确答案:A -
第20题：
You have a server that runs Windows Server 2003 Service Pack 2 （SP2）. The server is configured as a network address translation （NAT） router. The server has two network adapters and provides Internet access for the network. You need to prevent traffic on port 21 from being sent to the Internet. All other outbound traffic must be allowed. What should you do？（）
- A、On the network adapter that is connected to the LAN， enable TCP/IP filtering.
- B、On the network adapter that is connected to the Internet， enable TCP/IP filtering.
- C、From the Routing and Remote Access snap-in， open the properties of the interface connected to the Internet， select the Services and Ports tab， and define a new service.
- D、From the Routing and Remote Access snap-in， open the properties of the interface connected to the Internet， select the NAT/Basic Firewall tab， and define a new static packet filter.
正确答案:D -
第21题：
Which message type is constructed and sent from an MSDP router to its MSDP peers when it receives a PIM register message （knowing that the MSDP router is also configured as an RP for the PIM domain）？（）
- A、Source-Active Message
- B、PIM Join
- C、PIM Hello
- D、MSDP Register
正确答案:A -
第22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（）Adestination
Bresource
Cpacket
Dsource
正确答案： A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23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?（）AThe destination is a host on another subnet, so the router will not forward the packet.
BThe destination is a host on the same subnet, so the router will forward the packet.
CThe destination is a broadcast address, so the router will not forward the packet.
DThe destination is a network address, so the router will forward the packet.
正确答案： B解析： 暂无解析