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27 Cards in this Set
- Front
- Back
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A broadband service such as DSL available through a local Internet service provider is suitable for what type of organization?
A. A small company with 10 employees that uses a single LAN to share information B. A medium-size company with 500 employees that uses multiple LANs to share information C. A large company with 2,000 employees, in multiple locations and in a multi-LAN environment. |
A. A small company with 10 employees that uses a single LAN to share information
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Which device is a data terminal equipment (DTE)? A. Cable modem B. CSU-DSU C. Dialup modem D. DSL modem E. Router |
E. Router
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Which two devices are used when digital leased lines interconnect a client with a provider? (Choose two.) A. Access server B. Channel service unit (CSU) C. Data service unit (DSU) D. Dialup modem E. Layer 2 switch F. Router |
B. Channel service unit (CSU) C. Data service unit (DSU) |
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Which statements are true regarding connectionorientated packet-switched networks? (Choose three.) A. A virtual circuit is created for the duration of the packet delivery. B. Each packet has to carry only an identifier. C. Ethernet is an example. D. Full addressing information must be carried in each data packet. E. The Internet is an example. F. The network predetermines the route for each packet. |
A. A virtual circuit is created for the duration of the packet delivery. B. Each packet has to carry only an identifier. F. The network predetermines the route for each packet. |
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Which technology supports long distance SONET and SDH connections using fiber-optic media? A. ATM B. DSL C. DWDM D. Frame Relay E. ISDN F. MPLS |
C. DWDM
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What WAN technology is designed to deliver data, voice, and video simultaneously built on a cell-based architecture? A. ATM B. DSL C. DWDM D. Frame Relay E. ISDN F. MPLS |
A. ATM
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ISDN PRI is composed of how many B channels in North America? A. 2 B. 16 C. 23 D. 30 E. 64 |
C. 23
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The ability to connect securely to a private network over a public network is provided by which WAN technology? A. ATM B. DSL C. DWDM D. Frame Relay E. ISDN F. MPLS G. VPN H. VSAT I. WiMAX |
G. VPN
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What term describes the cabling that connects the customer site to the nearest exchange of the WAN service provider? A. CO B. DCE C. DTE D. Local loop |
D. Local loop
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Which two statements about a circuit-switched network are true? (Choose two.) A. A dedicated secure circuit is established between each pair of communicating nodes. B. A connection through the service provider network is established quickly before communications start. C. Multiple pairs of nodes can communicate over the same network channel. D. The communication costs are lower. |
A. A dedicated secure circuit is established between each pair of communicating nodes. B. A connection through the service provider network is established quickly before communications start. |
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When additional capacity is needed on a leased line |
ISDN
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When intermittent, low volume transfers are needed |
DSL
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When permanent point-to-point dedicated connections are required |
Leased line
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When connectivity in a remote location is needed and there are no service providers that offer WAN service |
VSAT
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What are two common types of circuit-switched WAN technologies? (Choose two.) PSTN ISDN Frame Relay DSL ATM |
PSTN
ISDN |
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Which two WAN infrastructure services are examples of private connections? (Choose two.) Frame Relay T1 or E1 DSL Cable Wireless |
Frame Relay
T1 or E1 |
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Branch office networks and corporate headquarter networks can be connected together using _____ VPN connections through the Internet infrastructure |
site-to-site
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What is a disadvantage of leased lines? High cost Inconsistent availability Complexity Low quality |
High cost
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A new corporation needs a data network that must meet certain requirements. The network must be fast and reliable to transmit secure video conferencing calls between two branches. If cost is not a consideration, which two types of WAN infrastructure would best meet the requirements? (Choose two.) Dedicated Internet Public infrastructure Private infrastructure Switched |
Dedicated Internet
Private infrastructure |
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What is a characteristic of end-to-end data transmission in a packet-switched network? A file may traverse multiple paths to reach the destination. A path is pre-determined before the transmission starts. A connection-oriented technology is employed. A dedicated path is maintained during the transmission period. |
A file may traverse multiple paths to reach the destination.
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Which medium do service providers use to transmit data over WAN connections with SONET, SDH, and DWDM? Satellite Fiber optic Wi-Fi Copper |
Fiber optic
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Which statement correctly describes a WAN technology? MPLS can be used to deliver any type of packet between sites. ISDN PRI is intended for the home and small enterprise and provides two 64 kbps B channels and a 16 kbps D channel. The 53-byte ATM cell operates more efficiently for big frames. VSATs create a public WAN while providing connectivity to remote locations. |
MPLS can be used to deliver any type of packet between sites. ISDN PRI is intended for the home and small enterprise and provides two 64 kbps B channels and a 16 kbps D channel.
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Which one of the WAN technologies is inadequate for video traffic but operates adequately for voice traffic? Ethernet WAN ATM Dialup ISDN BRI |
ISDN BRI
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Which public WAN technology provides security by using encrypted tunnels over Internet connections? VPN DSL 3G-4G Cable |
VPN
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A point that is established in a building or complex to separate customer equipment from service provider equipment |
Demarcation point
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Customer devices that pass from a customer network or host computer for transmission over the WAN |
DTE
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Devices that put data on the local loop |
DCE
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