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The（）provides the link between the Space Segment and the lan

题目
单选题
The（）provides the link between the Space Segment and the land-based National/International fixed communications networks.
A

VHF

B

SART

C

NAVTEX

D

LES

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相似问题和答案

第1题：

Cisco is the leader in the router market space. What basic functions do their routers perform. in a network? (Choose two)

A. The microsegmentation of broadcast domains

B. Path selection

C. Packet switching

D. Bridging between LAN segments

E. Access layer security

F. VLAN membership assignment

G. Application optimization


正确答案：BC
B,C 解析：Explanation:
The primary functions of a router are: Packet Switching and Path Selection. It is the routers job to determine the best method for delivering the data, and switching that data as quickly as possible.

第2题：

______ is permanently stored in the computer and provides a link between the hardware and other programs that run on the PC.

A．Interface

B．Operating system

C．Internet

D．Applicaion software


正确答案：B
解析：译文的含义是：()永久存储在计算机中，在硬件和PC机上运行的其他程序之间，提供联系。选项A、B、C、D的含义分别是接口、操作系统、因特网、应用软件。选项B符合题意，为所选。

第3题：

The Ezonexam corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

A．The number of broadcast domains will be decreased.

B．It will make the broadcasting of traffic between domains more efficient between segments.

C．It will increase the number of collisions.

D．It will prevent segment 1's broadcasts from getting to segment 2.

E．It will connect segment 1's broadcasts to segment 2.


正确答案：D
解析：Explanation
A router does not forward broadcast traffic. It therefore breaks up a broadcast domain, reducing unnecessary network traffic. Broadcasts from one segment will not be seen on the other segment.

Incorrect Answers:
A. This will actually increase the number of broadcast domains from one to two.

B. All link level traffic from segment one to segment two will now need to be routed between the two interfaces of the router. Although this will reduce the traffic on the LAN links, it does also provide a less efficient transport between the segments.

C. Since the network size is effectively cut into half, the number of collisions should decrease dramatically.

E. Broadcasts from one segment will be completely hidden from the other segment.

第4题：

Which statement is correct about an OSPF sham-link？（）

  • A、A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
  • B、A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.
  • C、A sham-link is a logical link between PE routers that carries OSPF LSAs and forwards customer traffic across it.
  • D、A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.
  • E、A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.

正确答案:B

第5题：

If the OSPF protocol is used to connect customer edge （CE） routers to service provider edge（PE） routers in the VPN backbone， which two options best describe the use of SHAM links？（）

  • A、A sham-link is created between any twoo VPN sites that belong to the same OSPF area and share an OSPF backdoor link
  • B、A sham-link is seen as an intra-area link between PE routers，an OSPF adjacency is created and data base is exchanged
  • C、A SHAM link is created between two directly connected PE routers so that it is preferred over the low speed backdoor door
  • D、A SHAM link is part of OSPF network of MPLS-VPN provider

正确答案:A,B

第6题：

In the open systems interconnection (OSI) reference model, "layer" means one of seven conceptually complete,(71) arranged groups of services, functions, and protocols, that extend across all open systems.Application layer provides means for the application(72) to access the OSI environment. Presentation layer provides for the selection of a common syntax for representing data.(73) layer provides the means necessary for cooperating presentation entities to organize and synchronize their dialog and to manage their data exchange. Transport layer provides a reliable end-to-end data transfer service. Network layer provides for the entities in the transport layer the means for transferring blocks of data, by(74) and switching through the network between the open systems in which those entities reside. Data link layer provides services to transfer data between network layer entities. Physical layer provides the mechanical, electrical, functional, and procedural means to establish, maintain and(75) physical connections for transfer of bits over a transmission medium.

A．rankly

B．levelly

C．layered

D．hierarchically


正确答案：D

第7题：

Which two of these are correct regarding the recommended practice for distribution layer design based on the following configuration?()

A. use a Layer 2 link between distribution switches

B. use a Layer 3 link between distribution switches

C. use a redundant link to the core

D. use a Layer 3 link between distribution switches with route summarization


参考答案：C, D

第8题：

The space between cylinder liner and jacket is called _____.

A.the cooling water

B.the circulating water

C.the cooler

D.the cooling water space


正确答案：D

第9题：

华为FSO设备命名为（）

  • A、Optix Space Line400
  • B、Optix Space Point400
  • C、Optix Space Road400
  • D、Optix Space Link400

正确答案:D

第10题：

Hosts on the same VLAN can communicate with each other but are unable to communicate with hosts on different VLANs. What is needed to allow communication between VLANs（）。

  • A、a switch with a trunk link that is configured between the switches
  • B、a router with an IP address on the physical interface that is connected to the switch
  • C、a switch with an access link that is configured between the switches
  • D、a router with subinterfaces configured on the physical interface that is connected to the switch

正确答案:D

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