計(jì)算機(jī)網(wǎng)絡(luò)管理員相同項(xiàng)單選集考_試卷模擬考試題

1、姓名：_ 班級：_ 學(xué)號：_-密-封 -線- 計(jì)算機(jī)網(wǎng)絡(luò)管理員相同項(xiàng)單選集考_試卷模擬考試題考試時(shí)間：120分鐘 考試總分：100分題號一二三四五總分分?jǐn)?shù)遵守考場紀(jì)律，維護(hù)知識尊嚴(yán)，杜絕違紀(jì)行為，確?？荚嚱Y(jié)果公正。1、each machine supporting tcp has a tcp transport entity, either a library procedure, a user process, or part of the kernel. in all case, it manages tcp streams and(1)to the ip layer. a tcp(2)a

2、ccepts user date streams from local process, breaks them into pieces not exceeding 64kb, and sends each piece as a separate ip(3).when datagrams containing tcp date arrive at a machine, they are given to the tcp entity, which reconstructs the original byte streams.the ip layer gives no guarantee tha

3、t datagrams will be delivered properly, so it is up to tcp to time out and(4)them as need be. datagrams do arrive may well do so in the wrong order, it is also up to tcp to(5)them into messages in the proper sequence.（1）是（ ）a.callsb.interfacesc.linksd.produces2、each machine supporting tcp has a tcp

4、transport entity, either a library procedure, a user process, or part of the kernel. in all case, it manages tcp streams and(1)to the ip layer. a tcp(2)accepts user date streams from local process, breaks them into pieces not exceeding 64kb, and sends each piece as a separate ip(3).when datagrams co

5、ntaining tcp date arrive at a machine, they are given to the tcp entity, which reconstructs the original byte streams.the ip layer gives no guarantee that datagrams will be delivered properly, so it is up to tcp to time out and(4)them as need be. datagrams do arrive may well do so in the wrong order

6、, it is also up to tcp to(5)them into messages in the proper sequence.（2）是（ ）a.connectionb.filec.entityd.destination3、each machine supporting tcp has a tcp transport entity, either a library procedure, a user process, or part of the kernel. in all case, it manages tcp streams and(1)to the ip layer.

7、a tcp(2)accepts user date streams from local process, breaks them into pieces not exceeding 64kb, and sends each piece as a separate ip(3).when datagrams containing tcp date arrive at a machine, they are given to the tcp entity, which reconstructs the original byte streams.the ip layer gives no guar

8、antee that datagrams will be delivered properly, so it is up to tcp to time out and(4)them as need be. datagrams do arrive may well do so in the wrong order, it is also up to tcp to(5)them into messages in the proper sequence.（3）是（ ）a.dategramb.streamc.connectiond.transaction4、each machine supportin

9、g tcp has a tcp transport entity, either a library procedure, a user process, or part of the kernel. in all case, it manages tcp streams and(1)to the ip layer. a tcp(2)accepts user date streams from local process, breaks them into pieces not exceeding 64kb, and sends each piece as a separate ip(3).w

10、hen datagrams containing tcp date arrive at a machine, they are given to the tcp entity, which reconstructs the original byte streams.the ip layer gives no guarantee that datagrams will be delivered properly, so it is up to tcp to time out and(4)them as need be. datagrams do arrive may well do so in

11、 the wrong order, it is also up to tcp to(5)them into messages in the proper sequence.（4）是（ ）a.reassembleb.reducec.re-created.retransmit5、each machine supporting tcp has a tcp transport entity, either a library procedure, a user process, or part of the kernel. in all case, it manages tcp streams and

12、(1)to the ip layer. a tcp(2)accepts user date streams from local process, breaks them into pieces not exceeding 64kb, and sends each piece as a separate ip(3).when datagrams containing tcp date arrive at a machine, they are given to the tcp entity, which reconstructs the original byte streams.the ip

13、 layer gives no guarantee that datagrams will be delivered properly, so it is up to tcp to time out and(4)them as need be. datagrams do arrive may well do so in the wrong order, it is also up to tcp to(5)them into messages in the proper sequence.（5）是（ ）a.reassembleb.reducec.re-created.retransmit6、a

14、multicast router may receive thousands of multicast(6)every day for different groups. if a router has no knowledge about the membership status of the(7), it must broadcast all of these packets. this creates a lot of traffic and consumes(8). a better solution is to keep a list of groups in the networ

15、k for which there is at least one loyal member.(9)helps the multicast router create and update this list. for each group, there is one router that has the duty of distributing the(10)packets lc.reportsd.alarms7、a multicast router may receive thousands of multicast(6)every day for different groups. i

16、f a router has no knowledge about the membership status of the(7), it must broadcast all of these packets. this creates a lot of traffic and consumes(8). a better solution is to keep a list of groups in the network for which there is at least one loyal member.(9)helps the multicast router create and

17、 update this list. for each group, there is one router that has the duty of distributing the(10)packets destined for that group. this means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. a host or multicast router can have membership

18、 in a group.（7）是（ ）a.routersb.networkc.packetsd.hosts8、a multicast router may receive thousands of multicast(6)every day for different groups. if a router has no knowledge about the membership status of the(7), it must broadcast all of these packets. this creates a lot of traffic and consumes(8). a

19、better solution is to keep a list of groups in the network for which there is at least one loyal member.(9)helps the multicast router create and update this list. for each group, there is one router that has the duty of distributing the(10)packets destined for that group. this means that if there ar

20、e three multicast routers connected to a network, their lists of groupids are mutually exclusive. a host or multicast router can have membership in a group.（8）是（ ）a.capabilityb.powerc.bandwidthd.address9、a multicast router may receive thousands of multicast(6)every day for different groups. if a rou

21、ter has no knowledge about the membership status of the(7), it must broadcast all of these packets. this creates a lot of traffic and consumes(8). a better solution is to keep a list of groups in the network for which there is at least one loyal member.(9)helps the multicast router create and update

22、 this list. for each group, there is one router that has the duty of distributing the(10)packets destined for that group. this means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. a host or multicast router can have membership in a g

23、roup.（9）是（ ）a.icmpb.igmpc.ospfd.rid10、a multicast router may receive thousands of multicast(6)every day for different groups. if a router has no knowledge about the membership status of the(7), it must broadcast all of these packets. this creates a lot of traffic and consumes(8). a better solution i

24、s to keep a list of groups in the network for which there is at least one loyal member.(9)helps the multicast router create and update this list. for each group, there is one router that has the duty of distributing the(10)packets destined for that group. this means that if there are three multicast

25、 routers connected to a network, their lists of groupids are mutually exclusive. a host or multicast router can have membership in a group.（10）是（ ）a.anycastb.multicastc.unicastd.broadcast11、a transport layer protocol has several responsibilities, one is to create a process-to-process (program-to-pro

26、gram) communication; tcp uses port(11)to accomplish this. another responsibility of a transport layer protocol is to create a(12)and error-control mechanism at the transport leveltcp uses a sliding(13)protocol to achieve flow controlit uses the acknowledgment packet，time-out，and retransmission to ac

27、hieve(14)controlthe transport layer is also responsible for providing a connection mechanism for the application programthe application program sends(15)of data to the transport layerit is the responsibility of the transport layer at the sending station to make a connection with the receiver（ ）a.num

28、bersb.connectionc.diagramsd.resources12、a transport layer protocol has several responsibilities, one is to create a process-to-process (program-to-program) communication; tcp uses port(11)to accomplish this. another responsibility of a transport layer protocol is to create a(12)and error-control mec

29、hanism at the transport leveltcp uses a sliding(13)protocol to achieve flow controlit uses the acknowledgment packet，time-out，and retransmission to achieve(14)controlthe transport layer is also responsible for providing a connection mechanism for the application programthe application program sends(

30、15)of data to the transport layerit is the responsibility of the transport layer at the sending station to make a connection with the receiver（ ）a.procedureb.functionc.routed.flow13、a transport layer protocol has several responsibilities, one is to create a process-to-process (program-to-program) co

31、mmunication; tcp uses port(11)to accomplish this. another responsibility of a transport layer protocol is to create a(12)and error-control mechanism at the transport leveltcp uses a sliding(13)protocol to achieve flow controlit uses the acknowledgment packet，time-out，and retransmission to achieve(14

32、)controlthe transport layer is also responsible for providing a connection mechanism for the application programthe application program sends(15)of data to the transport layerit is the responsibility of the transport layer at the sending station to make a connection with the receiver（ ）a.pathb.windo

33、wc.framed.diagram14、a transport layer protocol has several responsibilities, one is to create a process-to-process (program-to-program) communication; tcp uses port(11)to accomplish this. another responsibility of a transport layer protocol is to create a(12)and error-control mechanism at the transp

34、ort leveltcp uses a sliding(13)protocol to achieve flow controlit uses the acknowledgment packet，time-out，and retransmission to achieve(14)controlthe transport layer is also responsible for providing a connection mechanism for the application programthe application program sends(15)of data to the tr

35、ansport layerit is the responsibility of the transport layer at the sending station to make a connection with the receiver（ ）a.packetb.timec.errord.phase15、a transport layer protocol has several responsibilities, one is to create a process-to-process (program-to-program) communication; tcp uses port

36、(11)to accomplish this. another responsibility of a transport layer protocol is to create a(12)and error-control mechanism at the transport leveltcp uses a sliding(13)protocol to achieve flow controlit uses the acknowledgment packet，time-out，and retransmission to achieve(14)controlthe transport laye

37、r is also responsible for providing a connection mechanism for the application programthe application program sends(15)of data to the transport layerit is the responsibility of the transport layer at the sending station to make a connection with the receiver（ ）a.portsb.streamsc.packetsd.cells16、both

38、 bus and tree topologies are characterized by the use of multipoint(16)for the bus，all stations attach，through appropriate hardware(17)known as a tap，directly to a linear transmission medium，or busfull-duplex operation between the station and the tap allows data to be transmitted onto the bus and re

39、ceived from the(18)a transmission from any station propagates the length of the medium in both directions and can be received by all other(19)at each end of the bus is a(20)，which absorbs any signal，removing it from the bus（ ）a.mediumb.connectionc.tokend.resource17、both bus and tree topologies are c

40、haracterized by the use of multipoint(16)for the bus，all stations attach，through appropriate hardware(17)known as a tap，directly to a linear transmission medium，or busfull-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the(18)a transmiss

41、ion from any station propagates the length of the medium in both directions and can be received by all other(19)at each end of the bus is a(20)，which absorbs any signal，removing it from the bus（ ）a.processingb.switchingc.routingd.interfacing18、both bus and tree topologies are characterized by the us

42、e of multipoint(16)for the bus，all stations attach，through appropriate hardware(17)known as a tap，directly to a linear transmission medium，or busfull-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the(18)a transmission from any station p

43、ropagates the length of the medium in both directions and can be received by all other(19)at each end of the bus is a(20)，which absorbs any signal，removing it from the bus（ ）a.treeb.busc.stard.ring19、both bus and tree topologies are characterized by the use of multipoint(16)for the bus，all stations

44、attach，through appropriate hardware(17)known as a tap，directly to a linear transmission medium，or busfull-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the(18)a transmission from any station propagates the length of the medium in both d

45、irections and can be received by all other(19)at each end of the bus is a(20)，which absorbs any signal，removing it from the bus（ ）a.routersb.stationsc.serversd.switches20、both bus and tree topologies are characterized by the use of multipoint(16)for the bus，all stations attach，through appropriate ha

46、rdware(17)known as a tap，directly to a linear transmission medium，or busfull-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the(18)a transmission from any station propagates the length of the medium in both directions and can be received

47、 by all other(19)at each end of the bus is a(20)，which absorbs any signal，removing it from the bus（ ）a.tapb.repeatc.terminatord.concentrator21、for(21)service，we need a virtual-circuit subnetlet us see how that worksthe idea behind virtual circuits is to avoid having to choose a new(22)for every pack

48、et sentinstead， when a connection is established，a route from the(23)machine to the destination machine is chosen as part of the connection setup and stored in tables inside the(24)that route is used for all traffic flowing over the connection，exactly the same way that the telephone system works whe

49、n the connection is releasedthe virtual circuit is also tenninatedwith connection-oriented service，each packet carries an(25)telling which virtual circuit it belongs to（ ）a.connectionlessb.connectionorientedc.datagramd.telegram22、for(21)service，we need a virtual-circuit subnetlet us see how that wor

50、ksthe idea behind virtual circuits is to avoid having to choose a new(22)for every packet sentinstead， when a connection is established，a route from the(23)machine to the destination machine is chosen as part of the connection setup and stored in tables inside the(24)that route is used for all traff

51、ic flowing over the connection，exactly the same way that the telephone system works when the connection is releasedthe virtual circuit is also tenninatedwith connection-oriented service，each packet carries an(25)telling which virtual circuit it belongs to（ ）a.processorb.devicec.routed.terminal23、for

52、(21)service，we need a virtual-circuit subnetlet us see how that worksthe idea behind virtual circuits is to avoid having to choose a new(22)for every packet sentinstead， when a connection is established，a route from the(23)machine to the destination machine is chosen as part of the connection setup

53、and stored in tables inside the(24)that route is used for all traffic flowing over the connection，exactly the same way that the telephone system works when the connection is releasedthe virtual circuit is also tenninatedwith connection-oriented service，each packet carries an(25)telling which virtual

54、 circuit it belongs to（ ）a.sourceb.routec.destinationd.host24、for(21)service，we need a virtual-circuit subnetlet us see how that worksthe idea behind virtual circuits is to avoid having to choose a new(22)for every packet sentinstead， when a connection is established，a route from the(23)machine to t

55、he destination machine is chosen as part of the connection setup and stored in tables inside the(24)that route is used for all traffic flowing over the connection，exactly the same way that the telephone system works when the connection is releasedthe virtual circuit is also tenninatedwith connection

56、-oriented service，each packet carries an(25)telling which virtual circuit it belongs to（ ）a.connectionsb.resourcesc.bridgesd.routers25、for(21)service，we need a virtual-circuit subnetlet us see how that worksthe idea behind virtual circuits is to avoid having to choose a new(22)for every packet senti

57、nstead， when a connection is established，a route from the(23)machine to the destination machine is chosen as part of the connection setup and stored in tables inside the(24)that route is used for all traffic flowing over the connection，exactly the same way that the telephone system works when the connection is releasedthe virtual circuit is also t