Question 1

What is the difference between a DTE and a DCE?

Accepted Answer

The customer's endpoint device on the WAN is called the DTE (data terminal equipment), and the carrier's endpoint device for the WAN is called the DCE (data circuit terminating equipment). For example, if you have DSL service, you connect a home router with a DSL modem. A modem is a modulation/demodulation device that converts between digital and analog signals. In this case, the router is the DTE, usually owned by the customer, and the modem is the DCE, usually owned by the ISP. Generally, the DTE is the responsibility of the customer and the DCE is the responsibility of the ISP. The DTE communicates on the LAN, and the DCE communicates on the WAN. Sometimes the DTE and DCE are combined in the same device. For example, a router might have one WAN network adapter, or WIC (WAN interface connector), that connects to a fiber-optic or frame relay WAN and one LAN network adapter that connects to an Ethernet, twisted-pair LAN.

Question 2

In metro settings, end-to-end, carrier-grade Ethernet networks can be established via what protocol?

Accepted Answer

A)  Metro Carrier Transport 
B)  Carrier Ethernet Transport 
C)  Intra-city Ethernet 
D)  Ethernet SONET 
A)  Metro Carrier Transport 
B)  Carrier Ethernet Transport 
C)  Intra-city Ethernet 
D)  Ethernet SONET B

Question 3

What is the size of an ATM cell, including the header?

Accepted Answer

A)  48 bytes 
B)  53 bytes 
C)  64 bytes 
D)  84 bytes 
A)  48 bytes 
B)  53 bytes 
C)  64 bytes 
D)  84 bytes B

Question 4

In a public switched telephone network, lines are terminated at the central office.

Accepted Answer

A) True 
 B)False

Question 5

How does a LAN connection differ from a WAN connection?

Accepted Answer

The following list summarizes the major

Question 6

What is the role of a multiplexer when working with T-carrier lines?

Accepted Answer

A multiplexer combines multiple signals

Question 7

The T-carrier standards, also called T-CXR standards, utilize what type of multiplexing over two wire pairs to create multiple channels?

Accepted Answer

A)  wavelength division multiplexing (WDM) 
B)  frequency division multiplexing (FDM) 
C)  orthogonal frequency division multiplexing (OFDM) 
D)  time division multiplexing (TDM) 
A)  wavelength division multiplexing (WDM) 
B)  frequency division multiplexing (FDM) 
C)  orthogonal frequency division multiplexing (OFDM) 
D)  time division multiplexing (TDM)

Question 8

Considering that multiple users occupy the same channel when using CDMA, how are various calls using this technology kept separate?

Accepted Answer

A)  The packets are coded such that individual calls can be distinguished. 
B)  The packets include the end user's SIM IMEI in each packet. 
C)  The sending and receiving of data is performed on different frequencies. Users hop between these frequencies to avoid interference. 
D)  The transmissions are encrypted, such that only the appropriate device can decrypt its own call. 
A)  The packets are coded such that individual calls can be distinguished. 
B)  The packets include the end user's SIM IMEI in each packet. 
C)  The sending and receiving of data is performed on different frequencies. Users hop between these frequencies to avoid interference. 
D)  The transmissions are encrypted, such that only the appropriate device can decrypt its own call.

Question 9

Although MPLS can operate over Ethernet frames, it is more often used with other Layer 2 protocols, like those designed for WANs.

Accepted Answer

A) True 
 B)False

Question 10

Where are MPLS labels placed within a frame?

Accepted Answer

A)  between the layer 3 header and the data payload 
B)  between the data payload and the layer 2 trailer 
C)  between the layer 2 header and the layer 3 header 
D)  at the end of the layer 2 trailer 
A)  between the layer 3 header and the data payload 
B)  between the data payload and the layer 2 trailer 
C)  between the layer 2 header and the layer 3 header 
D)  at the end of the layer 2 trailer

Question 11

Which type of DSL technology has equal download and upload speeds maxing out at around 2 Mbps?

Accepted Answer

A)  ADSL2+ 
B)  VDSL 
C)  HDSL 
D)  SDSL 
A)  ADSL2+ 
B)  VDSL 
C)  HDSL 
D)  SDSL

Question 12

All ISDN connections were based on what two different types of channels?

Accepted Answer

ISDN connections were based on the follo

Question 13

The C-Band utilized by satellites consists of what frequency range?

Accepted Answer

A)  1.5 - 2.7 GHz 
B)  2.7 - 3.5 GHz 
C)  3.4 - 6.7 GHz 
D)  12 - 18 GHz 
A)  1.5 - 2.7 GHz 
B)  2.7 - 3.5 GHz 
C)  3.4 - 6.7 GHz 
D)  12 - 18 GHz

Question 14

Multiplexing enables a single T1 circuit to carry how many channels?

Accepted Answer

A)  1 
B)  12 
C)  24 
D)  64 
A)  1 
B)  12 
C)  24 
D)  64

Question 15

Which statement regarding the use of cable modems is NOT accurate?

Accepted Answer

A)  Modems that utilize the DOCSIS 3.0 or 3.1 standard are backward compatible with older DOCSIS networks. 
B)  DOCSIS 3.1 allows for full duplex speeds up to 10 Gbps. 
C)  Cable modems only operate at the Physical layer of the OSI model. 
D)  Cable broadband provides a dedicated and continuous connection. 
A)  Modems that utilize the DOCSIS 3.0 or 3.1 standard are backward compatible with older DOCSIS networks. 
B)  DOCSIS 3.1 allows for full duplex speeds up to 10 Gbps. 
C)  Cable modems only operate at the Physical layer of the OSI model. 
D)  Cable broadband provides a dedicated and continuous connection.

Question 16

Which of the following Layer 1 WAN technologies is not normally used as last mile service, but rather traverses multiple ISP networks, connecting these networks to the Internet backbone?

Accepted Answer

A)  SONET (Synchronous Optical Network) 
B)  T-carrier (T1s, fractional T1s, and T3s) 
C)  Carrier-Ethernet Transport (CET) 
D)  digital subscriber line (DSL) 
A)  SONET (Synchronous Optical Network) 
B)  T-carrier (T1s, fractional T1s, and T3s) 
C)  Carrier-Ethernet Transport (CET) 
D)  digital subscriber line (DSL)

Question 17

What is the MPLS standard, and why is it often used by ISPs to move traffic from one customer site to another?

Accepted Answer

MPLS (multiprotocol label switching) was

Question 18

When using satellite services for your WAN connection, what statement is accurate?

Accepted Answer

A)  Satellite downlink rates range from 50 to 100 Mbps. 
B)  Satellite services suffer more latency and jitter issues. 
C)  Satellite services are only available for fixed location clients. 
D)  Satellite uplink rates range from 5 to 10 Mbps. 
A)  Satellite downlink rates range from 50 to 100 Mbps. 
B)  Satellite services suffer more latency and jitter issues. 
C)  Satellite services are only available for fixed location clients. 
D)  Satellite uplink rates range from 5 to 10 Mbps.

Question 19

The word "synchronous" as used in the name of Synchronous Optical Network means that data being transmitted and received by nodes must conform to a timing scheme.

Accepted Answer

A) True 
 B)False

Question 20

When using DOCSIS 3.0, what is the minimum number of channels that can be used?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  16 
A)  1 
B)  2 
C)  4 
D)  16

What is the difference between a DTE and a DCE?

In metro settings, end-to-end, carrier-grade Ethernet networks can be established via what protocol?

What is the size of an ATM cell, including the header?

In a public switched telephone network, lines are terminated at the central office.

How does a LAN connection differ from a WAN connection?

What is the role of a multiplexer when working with T-carrier lines?

The T-carrier standards, also called T-CXR standards, utilize what type of multiplexing over two wire pairs to create multiple channels?

Considering that multiple users occupy the same channel when using CDMA, how are various calls using this technology kept separate?

Although MPLS can operate over Ethernet frames, it is more often used with other Layer 2 protocols, like those designed for WANs.

Where are MPLS labels placed within a frame?

Which type of DSL technology has equal download and upload speeds maxing out at around 2 Mbps?

All ISDN connections were based on what two different types of channels?

The C-Band utilized by satellites consists of what frequency range?

Multiplexing enables a single T1 circuit to carry how many channels?

Which statement regarding the use of cable modems is NOT accurate?

Which of the following Layer 1 WAN technologies is not normally used as last mile service, but rather traverses multiple ISP networks, connecting these networks to the Internet backbone?

What is the MPLS standard, and why is it often used by ISPs to move traffic from one customer site to another?

When using satellite services for your WAN connection, what statement is accurate?

The word "synchronous" as used in the name of Synchronous Optical Network means that data being transmitted and received by nodes must conform to a timing scheme.

When using DOCSIS 3.0, what is the minimum number of channels that can be used?

Introduction to Networking

Network Infrastructure and Documentation

Addressing on Networks

Network Protocols and Routing

Network Cabling

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Exam 12: Wide Area Networks

What is the difference between a DTE and a DCE?

In metro settings, end-to-end, carrier-grade Ethernet networks can be established via what protocol?

What is the size of an ATM cell, including the header?

In a public switched telephone network, lines are terminated at the central office.

How does a LAN connection differ from a WAN connection?

What is the role of a multiplexer when working with T-carrier lines?

The T-carrier standards, also called T-CXR standards, utilize what type of multiplexing over two wire pairs to create multiple channels?

Considering that multiple users occupy the same channel when using CDMA, how are various calls using this technology kept separate?

Although MPLS can operate over Ethernet frames, it is more often used with other Layer 2 protocols, like those designed for WANs.

Where are MPLS labels placed within a frame?

Which type of DSL technology has equal download and upload speeds maxing out at around 2 Mbps?

All ISDN connections were based on what two different types of channels?

The C-Band utilized by satellites consists of what frequency range?

Multiplexing enables a single T1 circuit to carry how many channels?

Which statement regarding the use of cable modems is NOT accurate?

Which of the following Layer 1 WAN technologies is not normally used as last mile service, but rather traverses multiple ISP networks, connecting these networks to the Internet backbone?

What is the MPLS standard, and why is it often used by ISPs to move traffic from one customer site to another?

When using satellite services for your WAN connection, what statement is accurate?

The word "synchronous" as used in the name of Synchronous Optical Network means that data being transmitted and received by nodes must conform to a timing scheme.

When using DOCSIS 3.0, what is the minimum number of channels that can be used?

Introduction to Networking

Network Infrastructure and Documentation

Addressing on Networks

Network Protocols and Routing

Network Cabling

Wireless Networking

Virtualization and Cloud Computing

Subnets and VLANs

Network Risk Management

Security in Network Design

Network Performance and Recovery

Filters