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● Networks can be interconnected by different devices. In the physical layer，networks can be connected by（1）or hubs，which just move the bits from one network to an identical network. One layer up we find bridges and switches，which operate at data link layer. They can accept（2）,examine the MAC address，and forward the frames to a different network while doing minor protocol translation in the process. In the network layer，we have routers that can connect two networks. If two networks have（3）network layer， the router may be able to translate between the packet formats. In the transport layer we find transport gateway， which can interface between two transport connections. Finally，in the application layer， application gateways translate message（4）.As an example， gateways between Internet e-mail and X.400 e-mail must （5）the e-mail message and change various header fields.
（1）
A.reapers
B.relays
C.connectors
D.modems
（2）
A.frames
B.packets
C.packages
D.cells
（3）
A.specia l
B.dependent
C.similar
D.dissimilar
（4）
A.syntax
B.semantics
C.language
D.format
（5）
A.analyze
B.parse
C.delete
D.create
参考答案
更多 “ ● Networks can be interconnected by different devices. In the physical layer，networks can be connected by（1）or hubs，which just move the bits from one network to an identical network. One layer up we find bridges and switches，which operate at data link layer. They can accept（2）,examine the MAC address，and forward the frames to a different network while doing minor protocol translation in the process. In the network layer，we have routers that can connect two networks. If two networks have（3）network layer， the router may be able to translate between the packet formats. In the transport layer we find transport gateway， which can interface between two transport connections. Finally，in the application layer， application gateways translate message（4）.As an example， gateways between Internet e-mail and X.400 e-mail must （5）the e-mail message and change various header fields.（1）A.reapersB.relaysC.connectorsD.modems（2）A.framesB.packetsC.packagesD.cells（3）A.specia lB.dependentC.similarD.dissimilar（4）A.syntaxB.semanticsC.languageD.format（5）A.analyzeB.parseC.deleteD.create ” 相关考题
考题
● (74) functions with two layers of protocols．It can connect networks of different speeds and can be adapted to an environment as it expands．(74) A．The hubB．The bridgeC．The routerD．The proxy
考题
●Communication networks can be classified in terms of their physical arrangement or (73) Three common (73) are the star,bus,and ring.(73) A．structuresB．topologiesC．protocolsD．frames
考题
●Networks can be interconnected by different devices．In the physical layer，networks can be connected by (66) or Hubs，which just move the bits from one network to an identical network．One layer up we find bridgas and swiehes,which operate at data link layer．They can accept (67) ，examine the MAC address，and forward the frames to a different network while doing minor protocol translation in the process．In the network layer，we have routers that can connect two netwoks．If two networks have (68) network layer，the router may be able to translate between the packet formats．In the transport layer we find transport gateway，which can interface between the two transport connections．Finally，in the application layer，application gateways translate message (69) ．As an example，gateways between Internet e-mail and X．400 e-mail must (70) the e-mail message and change various header fields．(66) A．reapersB．relaysC．connectsD．modems(67) A．framesB．bytesC．packagesD．cells(68) A．specialB．dependentC．similarD．dissimilar(69) A．syntaxB．semanticsC．languagesD．format(70) A．analyzeB．pairsC．deleteD．create
考题
Networks can be interconnected by different devices in the physical layer networks can be connected by (71) or hubs．which just move the bits from one network to an identical network．One layer up we find bridges and switches which operate at data link layer．They can accept (72) ，examine the MAC address and forward the frames to a different network while doing minor protocol translation in the process in me network layer，we have routers that can connect two networks，If two networks have (73) network layer，the router may be able to translate betweenthe packer formats．In the transport layer we find transport gateway，which can interface between two transport connections Finally，in the application layer，application gateways translate message (74) ．As an example，gateways between Internet e-mail and X，400 e-mail must (75) thee-mail message and change various header fields．(68)A．reapersB．relaysC．packagesD．modems
考题
● OSI is a theoretical model that shows how any two different systems can communicate with each other．Router, as a networking device, operate at the (71) layer of the OSI model．(71)A．transportB．applicationC．networkD．physical
考题
functions with two layers of protocols. It can connect networks of different speeds and can be adapted to an environment as it expands.A．The hubB．The bridgeC．The routerD．The proxy
考题
Communication networks can be classified in terms of their physical arrangement or(74). Three common(74)are the star, bus, and ring.A．structuresB．topologiesC．protocolsD．frames
考题
Packet switching is a method of slicing(71) messages into parcels called "packets," sending the packets along different communication(72) as they become available, and then reassembling the packets(73) they arrive at their destination. Prior to the development of packet switching, early computer networks used leased, dedicated telephone circuits to(74) with terminals and other computers. In circuit-switched networks such as the telephone system, a complete point-to-point(75) is put together, and then communication can proceed.A．binaryB．usefulC．digitalD．analog
考题
Networks can be interconnected by different devices. In the physical layer, networks can be connected by(66)or hubs, which just move the bits from one network to an identical network. One layer up we find bridges and switches, which operate at data link layer. They can accept(67), examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two networks. If two networks have(68)network layer, the router may be able to translate between the packet formats. In the transport layer we fmd transport gateway, which can interface between two transport connections. Finally, in the application layer, application gateways translate message(69). As an example, gateways between Internet e-mail and X.400 e-mail must(70)the e-mail message and change various header fields.A．repeatersB．relaysC．connectorsD．modems
考题
The IP network 210.106.14.0 is subnetted using a /24 mask. How many usable networks and host addresses can be obtained from this?A．1 network with 254 hostsB．4 networks with 128 hostsC．2 networks with 24 hostsD．6 networks with 64 hostsE．8 networks with 36 hosts
考题
OSI is a theoretical model that shows how any two different systems can communicate with each other. Router, as a networking device, operate at the ______ layer of the OSI model.A．transportB．applicationC．networkD．physical
考题
Routers perform the decision process that selects what path a packet takes. These （ ） layer devices participate it the collection and distribution of network-layer information, and perform Layer 3 switching based on the contents of the network layer （ ） of each packet. You can connect the routers directly by point-to-point （ ） or local-area networks, or you can connect them by LAN or WAN switches. These Layer 2 switches unfortunately do not have the capability to hold Layer 3 （ ） information or to select the path taken by a packet through analysis of its Layer 3 destination address. Thus, Layer 2 switches be involved in the Layer 3 packet （ ） decision process.A.application B. network C.physical D.link A.header B.connection C.protocol D.data A.medium B.links C.switches D.carriers A.network B.links C.protocol D.routing A.switching B.processing C.forwarding D.connecting
考题
Networks can be interconnected by different devices.In the physical layer, networks can be connected by（ ） or hubs, which just move the bits from one network to an identical network.A.repeaters
B.relays
C.connectors
D.modems
考题
For each blank，choose the best answer from the four choices and write down on the answer sheet.
（ ）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.
（请作答此空）is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.
（ ）functions with two layers of protocols.It Can connect networks of different speeds and can be adapted to an environment as it expands.
（ ）is the popular LAN developed under the direction of the IEEE 802.5.
（ ）is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.A.ISO
B.ANSI
C.CCITT
D.IEEE
考题
For each blank，choose the best answer from the four choices and write down on the answer sheet.
（ ）is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication.
（ ）is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols.
（请作答此空）functions with two layers of protocols.It Can connect networks of different speeds and can be adapted to an environment as it expands.
（ ）is the popular LAN developed under the direction of the IEEE 802.5.
（ ）is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI.A.The hub
B.The bridge
C.The router
D.The proxy
考题
What are three advantages of VLANs?（）A、VLANs establish broadcast domains in switched networks.B、VLANs utilize packet filtering to enhance network security.C、VLANs provide a method of conserving IP addresses in large networks.D、VLANs provide a low-latency internet working alternative to routed networks.E、VLANs allow access to network services based on department, not physical location.F、VLANs can greatly simplify adding, moving, or changing hosts on the network.
考题
The IP network 210.106.14.0 is subnetted using a /24 mask. How many usable networks and host addresses can be obtained from this?（）A、1 network with 254 hostsB、4 networks with 128 hostsC、2 networks with 24 hostsD、6 networks with 64 hostsE、8 networks with 36 hosts
考题
Overlay Transport Virtualization （OTV） join interface is used to source the OTV encapsulated traffic and send it to the Layer 3 domain of the data center network. Which statements are true about OTV join interface？ （）A、 Join interface is a Layer 3 entity， and with the Cisco NX-OS release 6.0， it can only be defined as a physical interface， physical subinterface， Layer 3 port channel， or Layer 3 port channel subinterface.B、 A single join interface can be defined and associated with a given OTV overlay.C、 Multiple overlays can also share the same join interface.D、 Join interface can be a loopback interface.E、 The join interface is a Layer 3 entity that can be defined as a physical interface but not as a logical one.
考题
How could a large corporation with many specialized divisions benefit from using VLANs on their networks?（）A、VLANs allow access to network services based on department, not physical location.B、VLANs utilize packet filtering to enhance network security.C、VLANs provide a low-latency, high bandwidth internetworking alternative.D、VLANs provide a method of communication between IP addresses in large networks.E、VLANs establish segmented broadcast domains in switched networks.F、VLANs can greatly simplify adding, moving, or changing hosts on the network.
考题
Why can security on healthcare networks be an important issue for customers？（）A、offers a rapid return on investmentB、telecommutingC、multiple network connectionsD、legal mandates
考题
Which statements are valid for a local SPAN configuration？ （）A、 Source and destination interface must be on the same hostB、 Source and destination interfaces can be on different hostsC、 Destination vEthernet interface can be on a different VLAN than the sourceD、 Destination interface can be a physical portE、 Destination interface cannot be a physical port
考题
多选题Which statements are valid for a local SPAN configuration？ （）ASource and destination interface must be on the same hostBSource and destination interfaces can be on different hostsCDestination vEthernet interface can be on a different VLAN than the sourceDDestination interface can be a physical portEDestination interface cannot be a physical port
考题
多选题Overlay Transport Virtualization （OTV） join interface is used to source the OTV encapsulated traffic and send it to the Layer 3 domain of the data center network. Which statements are true about OTV join interface？ （）AJoin interface is a Layer 3 entity， and with the Cisco NX-OS release 6.0， it can only be defined as a physical interface， physical subinterface， Layer 3 port channel， or Layer 3 port channel subinterface.BA single join interface can be defined and associated with a given OTV overlay.CMultiple overlays can also share the same join interface.DJoin interface can be a loopback interface.EThe join interface is a Layer 3 entity that can be defined as a physical interface but not as a logical one.
考题
单选题The passage is primarily concerned with ______.A
the etiquette of the eighteenth centuryB
the ensuing romance between two people from different social classesC
the lesson that one can never be too carefulD
the resilience of the human spirit to rise after a fall and adapt to new surroundingsE
the workings of social networks and importance of befriending the upper class
考题
多选题How could a large corporation with many specialized divisions benefit from using VLANs on their networks?（）AVLANs allow access to network services based on department, not physical location.BVLANs utilize packet filtering to enhance network security.CVLANs provide a low-latency, high bandwidth internetworking alternative.DVLANs provide a method of communication between IP addresses in large networks.EVLANs establish segmented broadcast domains in switched networks.FVLANs can greatly simplify adding, moving, or changing hosts on the network.
考题
多选题What are three advantages of VLANs?（）AVLANs establish broadcast domains in switched networks.BVLANs utilize packet filtering to enhance network security.CVLANs provide a method of conserving IP addresses in large networks.DVLANs provide a low-latency internet working alternative to routed networks.EVLANs allow access to network services based on department, not physical location.FVLANs can greatly simplify adding, moving, or changing hosts on the network.
考题
单选题The IP network 210.106.14.0 is subnetted using a /24 mask. How many usable networks and host addresses can be obtained from this?（）A
1 network with 254 hostsB
4 networks with 128 hostsC
2 networks with 24 hostsD
6 networks with 64 hostsE
8 networks with 36 hosts
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