Circuit-switching technology is used in Publish Switched Telephone Network(PSTN), Global System for Mobile Communications(GSM) and code Division Multiple Access (CMDA) .It is a ( ) information transfer mode.A.connection orientedB.connectionlessC.high band

题目

Circuit-switching technology is used in Publish Switched Telephone Network(PSTN), Global System for Mobile Communications(GSM) and code Division Multiple Access (CMDA) .It is a ( ) information transfer mode.

A.connection oriented

B.connectionless

C.high bandwidth utilization

D.poor real-time

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1.In John Whitehead's opinion, which statement is true?A．Face recognition technology may interfere with people's privacy.B．Face recognition technology may enhance the country's constant surveillance.C．Face recognition technology can be used in the same way wiretaps are used.D．Face recognition technology can be used after its threat has been removed.

2.公众电话交换网(PSTN,PuBlic SwitcheD Telephone Network)是承载话音业务的基础网络,其采用的技术是()。A.话音交换技术B.数据交换技术C.集中交换技术D.电路交换技术

3.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

4.【An overall cellular network contains a number of different elements from the base transceiver station (BTS) itself with its antenna back through a base station controller (BSC), and a mobile switching centre (MSC) to the location registers (HLR and VLR) and the link to the public switched telephone network (PSTN). Of the units within the cellular network, the BTS provides the direct communication with the mobile phones. There may be a small number of base stations then linked to a base station controller. This unit acts as a small centre to route calls to the required base station, and it also makes some decisions about which of the base station is best suited to a particular call. The links between the BTS and the BSC may use either land lines of even microwave links. Often the BTS antenna towers also support a small microwave dish antenna used for the link to the BSC. The BSC is often co-located with a BTS. The BSC interfaces with the mobile switching centre. This makes more widespread choices about the routing of calls and interfaces to the land line based PSTN as well as the HLR and VLR.】 From the paragraph above, in a cellular network, the （98） can provide direct communication with a mobile phone, the （99） acts as a small centre to route calls to the required base station, and it also makes some decisions about which of the base station is best suited to a particular call.（100） can be used to link the BSC with related BTS。A. BSC B. BTS C. MSC D. VLR A. BSC B. BTS C. MSC D. HLR A. Land lines B. Microwave links C. Microwave dish antenna D. Land lines or microwave links

更多“Circuit－switching technology is used in Publish Switched Telephone Network(PSTN), Global S ”相关问题

  • 第1题：

    is a channel' s capacity which directly reflects the data transfer rate of the channel.(67)functions in a NetWare network which is used to define addressing schemes.(68)is a network layer device that suports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.(69)．is the popular LAN develped under the direction of the IEEE 802.3.(70)is a device which enables digital microcomputers to communicate across analog telephone lines.

    A．The volume

    B．The bandwidth

    C．The noise

    D．The delay


    正确答案：B

  • 第2题：

    whether to go with a shared or switched fast LAN technology once you start to max out your shared Ethernet of token-ring LAN is tough call. Users and analysts involved in(101)high-speed LANs have learned the benefits of each. However, there are trade-offs to each, and(102)which fast LAN technology to choose is critical for(103)network performance problems and(104)costly purchasing mistakes.

    A．avoiding

    B．clipping

    C．choosing

    D．deciding

    E．dissolving


    正确答案：D

  • 第3题：

    In any NAT (network address translation) configuration, what is the Inside Global IP address?()

    A. The summarized address for all internal subnetted addresses.

    B. A private IP address assigned to a host on the inside network.

    C. A registered address that represents an inside host to an outside network.

    D. A unique IP address used on an internal network

    E. Non of the above


    参考答案：C

  • 第4题：

    The project, ___________ by the end of 2020, will expand the city′ s telephone network to cover 1,000,000 users.

    A.accomplished
    B.being accomplished
    C.to be accomplished
    D.having been accomplished

    答案：C
    解析：
    考查不定式作定语。句意为“这项将在2020年底被完成的项目，将会拓宽城市的电话网络，使其覆盖至一百万用户”。本题中的时间状语是2020年底，说明该事情是未来将被完成的，故使用不定式的被动形式to be done表示将来和被动。A、D项表示被动和已经完成；B项表示正在被做：C项表示将要被完成。故C正确。

  • 第5题：

    PSTN的中文全程是（）最早的主要是提供电话业务。英文全程是Public Switch Telephone Network。


    正确答案:公用电话交换网

  • 第6题：

    Which statement is true about Foreign Exchange Station （FXS） ports on a router？（）

    • A、The FXS interface allows an analog connection to be directed at the public switched telephone network （PSTN’s） central office.
    • B、The FXS interface connects directly to a standard telephone，fax machine，or similar device and supplies ring，voltage，and dial tone.
    • C、The FXS interface connects directly to an IP phone and supplies ring，voltage，and dial tone.
    • D、The FXS interface connects directly to ISDN voice channels.

    正确答案:B

  • 第7题：

    In any NAT (network address translation) configuration, what is the Inside Global IP address?（）

    • A、The summarized address for all internal subnetted addresses.
    • B、A private IP address assigned to a host on the inside network.
    • C、A registered address that represents an inside host to an outside network.
    • D、A unique IP address used on an internal network
    • E、Non of the above

    正确答案:C

  • 第8题：

    Which device is normally used to translate telephone numbers or names to IP addresses for call routing in an H.323 network？ （）

    • A、call agent
    • B、IP phone
    • C、multipoint control unit
    • D、gatekeeper

    正确答案:D

  • 第9题：

    单选题
    Circuit-switching technology is used in Publish Switched Telephone Network(PSTN), Global System for Mobile Communications(GSM) and code Division Multiple Access (CMDA) . It is a ( ) information transfer mode.
    A

    connection oriented

    B

    connectionless

    C

    high bandwidth utilization

    D

    poor real-time


    正确答案： C
    解析： 暂无解析

  • 第10题：

    单选题
    公众电话交换网（PSTN，PuBlic SwitcheD Telephone Network）是承载话音业务的基础网络，其采用的技术是（）。
    A

    话音交换技术

    B

    数据交换技术

    C

    集中交换技术

    D

    电路交换技术


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    Which statements is true about Foreign Exchange Station （FXS） ports on a router？（）
    A

    the FXS interface allows an analog connection to be directed at the public switched telephone network （PSTN’s） central office

    B

    the FXS interface connect directly to a standard telephone， fax machine， or sililar device and supplies ring， voltage， and dial tone

    C

    the FXS interface connect directly to an IP phone and supplies ring， voltage， and dial tone

    D

    the FXS interface connect directly to ISDN voice channels


    正确答案： D
    解析： 暂无解析

  • 第12题：

    填空题
    PSTN的中文全程是（）最早的主要是提供电话业务。英文全程是Public Switch Telephone Network。

    正确答案： 公用电话交换网
    解析： 暂无解析

  • 第13题：

    The(66)is a channel's capacity which directly reflects the data transfer rate of the channel.

    (67)functions in a NetWare network which is used to define addressing schemes.

    The(68)is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.

    (69)is the popular LAN developed under the direction of the IEEE802.3.

    The(70 is a device which enables digital microcomputers to communicate across analog telephone lines.

    A．volume

    B．bandwidth

    C．noise

    D．delay


    正确答案：B
    解析：带宽(bandwidth)是指一个信道的容量，它直接反映数字在信道中传榆的速率。

  • 第14题：

    Intermediate system to intermediate system (IS - IS), is a protocol used by network devices (routers) to determine the best way to forward datagrams through a packet - switched network, a process called routing. Which three attributes are of the IS - IS routing protocol? （）

    A. supports VLSM

    B. link - state routing protocol

    C. operati on is similar to BGP

    D. supports two routing levels within an autonomous system


    参考答案：A, B, D

  • 第15题：

    Circuit-switching technology is used in Public Switched Telephone Network（PSTN）, Global System for Mobile Communications（GSM） and Code Division Multiple Access（CDMA）. It is a （ ） information transfer mode.

    A.Connection oriented
    B.connectionless
    C.High bandwidth utilization
    D.Poor-real-time

    答案：A
    解析：
    电路交换技术用于PSTN、GSM和CDMA，它是一种（72）信息传输模式。

  • 第16题：

    Which statements is true about Foreign Exchange Station （FXS） ports on a router？（）

    • A、the FXS interface allows an analog connection to be directed at the public switched telephone network （PSTN’s） central office
    • B、the FXS interface connect directly to a standard telephone， fax machine， or sililar device and supplies ring， voltage， and dial tone
    • C、the FXS interface connect directly to an IP phone and supplies ring， voltage， and dial tone
    • D、the FXS interface connect directly to ISDN voice channels

    正确答案:B

  • 第17题：

    公众电话交换网（PSTN，PuBlic SwitcheD Telephone Network）是承载话音业务的基础网络，其采用的技术是（）。

    • A、话音交换技术
    • B、数据交换技术
    • C、集中交换技术
    • D、电路交换技术

    正确答案:D

  • 第18题：

    In a switched LAN network, what is the Spanning-Tree algorithm used for?（）

    • A、It is used to provide a mechanism for routing updates in switched environments.
    • B、It is used to prevent routing loops in networks with redundant routes.
    • C、It is used to prevent switching loops in networks with redundant switched routes.
    • D、It is used to manage, the addition, deletion, and naming of VLANs across multiple switches.
    • E、It is used to segment a network into multiple collision domains.
    • F、None of the above.
    • G、All of the above are functions of STP.

    正确答案:C

  • 第19题：

    Intermediate system to intermediate system (IS - IS), is a protocol used by network devices (routers) to determine the best way to forward datagrams through a packet - switched network, a process called routing. Which three attributes are of the IS - IS routing protocol? （）

    • A、supports VLSM
    • B、link - state routing protocol
    • C、operati on is similar to BGP
    • D、supports two routing levels within an autonomous system

    正确答案:A,B,D

  • 第20题：

    You are a network administrator for your company. The network consists of a single Active Directory domain. A user named Mary works in the information technology (IT) security department. Mary is a member of the ITSecurity global group. Mary reports that no one in the ITSecurity global group can access the security log from the console of a computer named Server1. You need to grant the ITSecurity global group the minimum rights necessary to view the security log on Server1. How should you modify the local security policy？（）

    • A、Assign the Generate security audits user right to the ITSecurity global group.
    • B、Assign the Manage auditing and security logs user right to the ITSecurity global group.
    • C、Assign the Allow logon through Terminal Services user right to the ITSecurity global group.
    • D、Assign the Act as part of the operating system user right to the ITSecurity global group.

    正确答案:B

  • 第21题：

    单选题
    An alternative to plain old telephone service (POTS) would be:（）
    A

    X.25.

    B

    Asynchronous transfer mode (ATM).

    C

    VoIP.

    D

    Public Switched Telephone Network (PSTN).


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    What type of services are provided by the Cisco IOS gateways in a VoIP network with Cisco CallManager functionality？ （）
    A

    Cisco IOS gateways provide services such as address translation and network access control for the devices on the networl

    B

    Cisco IOS gateways provide services such as bandwidth management and accounting

    C

    Cisco IOS gateways provide media termination and signal translation between the public switched telephone network （PSTN） and IP networks

    D

    Cisco IOS gateways provide zone management for all registered endpoints in the network


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    Which statement is true about Foreign Exchange Station （FXS） ports on a router？（）
    A

    The FXS interface allows an analog connection to be directed at the public switched telephone network （PSTN’s） central office.

    B

    The FXS interface connects directly to a standard telephone，fax machine，or similar device and supplies ring，voltage，and dial tone.

    C

    The FXS interface connects directly to an IP phone and supplies ring，voltage，and dial tone.

    D

    The FXS interface connects directly to ISDN voice channels.


    正确答案： D
    解析： 暂无解析

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