Question 1

Select the true statement regarding analog and digital signals.
A) Analog signals vary over time continually and can be represented by a sine wave,while digital signals are binary 1s and 0s using voltage levels.
B) Digital signals vary over time continually and can be represented by a sine wave,while analog signals are binary 1s and 0s using voltage levels
C) A modem is not required to use a line that uses analog signals.
D) On fiber optic media,a 1 bit can be represented as a pulsing analog signal.

Accepted Answer

Analog signals are continuous and can be represented by a sine wave while digital signals are discrete and represented by binary 1s and 0s. A modem is typically required to convert digital signals to analog signals for transmission over a phone line. On fiber optic media, a 1 bit is represented as a pulse of light, not an analog signal.

Question 2

You have been asked to install a VPN remote access solution using Windows Server.What do you need to install?
A) Microsoft Mobile User Service (MMUS)
B) Windows Server Remote Access (WSRA)
C) Routing and Remote Access Service (RRAS)
D) Dialup and Remote Access Services (DRAS)

Accepted Answer

Installing Routing and Remote Access Service (RRAS) on the Windows Server enables VPN remote access capabilities. RRAS allows clients to connect to a VPN server using PPTP, L2TP, SSTP, or IKEv2 protocols. It also provides routing services to enable remote access users to access network resources. Option A is not relevant to VPN remote access. Option B is a feature that can be enabled within RRAS, but it is not a standalone solution. Option D refers to an outdated service that has been replaced by RRAS.

Question 3

Which cloud computing category allows a company to quickly provision additional disk space?
A) hosted networking
B) hosted applications
C) hosted platforms
D) hosted infrastructure

Accepted Answer

Hosted infrastructure provides on-demand access to resources such as servers and storage, making it the category that allows a company to quickly provision additional disk space when needed.

Question 4

Which one of the following is NOT a typical SONET data rate?
A) OC-3
B) OC-48
C) OC-768
D) OC-9001

Accepted Answer

The SONET data rates typically start with OC-1 and increase in multiples of 4, with some exceptions such as OC-3, OC-12, and OC-48. OC-768 is also a standard SONET data rate. However, OC-9001 is not a typical SONET data rate and is not recognized by the standard.

Question 5

Link Control Protocol is responsible for the setup of a PPP connection,as well as the termination of a connection when it has ended.

Accepted Answer

Link Control Protocol (LCP) is responsible for initiating, configuring, and terminating a PPP connection. It establishes the link and sets up the parameters for data transfer. If the connection fails, LCP will terminate the connection.

Question 6

T-Carrier lines only require a CSU/DSU on the customer's side of the connection.

Accepted Answer

T-Carrier lines require a CSU/DSU on both the customer's side and the provider's (telco) side of the connection. The CSU/DSU is used to translate the signals between the customer's equipment and the telco's equipment.

Question 7

What is the local loop,or last mile?
A) the connection used between central offices
B) cable between the customer premise equipment and a PC
C) a line used by ISPs for testing T-carrier signals.
D) the connection between the demarcation point and the CO

Accepted Answer

The local loop, or last mile, refers to the connection between the demarcation point (where the service provider's responsibility ends and the customer's responsibility begins) and the central office (CO) of the service provider. This is usually a copper or fiber optic cable that carries voice and data signals from the customer's premises to the CO. Option A refers to the interoffice trunk, and option C refers to the T-carrier signal testing line, both of which are different from the local loop or last mile. Option B refers to the connection between customer premise equipment and a PC, which may or may not involve the local loop depending on the type of connection used.

Question 8

Which of the following terms describes the category of cloud computing in which a customer develops applications using development tools and infrastructure provided by the service provider?
A) Infrastructure as a service
B) Software as a service
C) Platform as a service
D) Network as a service

Accepted Answer

Platform as a service (PaaS) describes the category of cloud computing in which a customer develops applications using development tools and infrastructure provided by the service provider. Infrastructure as a service (IaaS) provides virtualized infrastructure such as servers or storage over the internet. Software as a service (SaaS) delivers software applications over the internet. Network as a service (NaaS) provides network services such as data transfer, routing, and security over the internet.

Question 9

Packet switched WANs use virtual circuits to ensure that packets are delivered reliably and at the agreed-on bandwidth level.

Accepted Answer

Packet switched WANs use virtual circuits to ensure that packets are delivered reliably and at the agreed-on bandwidth level.

Question 10

Your local ISP has provided you with a dedicated line that has a Committed Information Rate of 1.54 Mbps.What does this mean?
A) 1.54 Mbps is the guaranteed maximum transmission rate.
B) 1.54 Mbps is allocated and available for burst network traffic only.
C) 1.54 Mbps is the guaranteed minimum transmission rate.
D) The dedicated line is using frame relay.

Accepted Answer

Committed Information Rate (CIR) is the guaranteed minimum transmission rate for a dedicated line. This means that the ISP has committed to providing at least 1.54 Mbps of bandwidth for the duration of the contract. Burst network traffic may exceed this rate temporarily, but the CIR ensures that the line will not drop below 1.54 Mbps. The use of frame relay is not mentioned and therefore not relevant to the question.

Question 11

Which statement about Multiprotocol Label Switching (MPLS)is true?
A) MPLS is popular because of its ease of use and inexpensive cost.
B) MPLS works with any network layer protocol.
C) MPLS is dependent on Data Link layer technology.
D) MPLS will run over ATM,frame relay,SONET,but not Ethernet.

Accepted Answer

MPLS works with any network layer protocol, making it flexible and adaptable to a variety of networks. It is not dependent on Data Link layer technology, and it can run over ATM, frame relay, SONET, and Ethernet. While cost is a factor in MPLS popularity, it is not necessarily inexpensive and ease of use can vary depending on implementation.

Question 12

You are a network architect for an IT consulting company.One of your clients needs a WAN connection and has asked you about the disadvantage of a packet-switched WAN method.Which of the following is a disadvantage that applies?
A) low bandwidth
B) expensive compared to leased lines
C) suspect reliability
D) shared bandwidth

Accepted Answer

Packet-switched WAN methods share bandwidth among multiple users, which can lead to variable performance and potential congestion, especially during peak usage times.

Question 13

Which of the following protocols is NOT used for Windows 7 VPN connections?
A) SMTP
B) PPTP
C) L2TP
D) SSTP

Accepted Answer

SMTP (Simple Mail Transfer Protocol) is a protocol used for sending email messages and is not related to VPN connections. The other three protocols (PPTP, L2TP, and SSTP) are commonly used for Windows 7 VPN connections.

Question 14

When would you most likely NOT choose to use a leased line connection?
A) when high-quality,24/7 access is needed
B) for mission critical applications
C) when fast upstream as well as downstream communications is required
D) when a nondedicated link is needed for backups

Accepted Answer

A leased line connection provides a dedicated connection between two points, which is suitable for high-quality, 24/7 access, mission-critical applications, and fast upstream and downstream communication. However, when a nondedicated link is needed for backups, a leased line can be an expensive and unnecessary option. In this case, a lower-cost alternative such as a broadband or wireless connection can suffice.

Question 15

What would an Asynchronous Transfer Mode (ATM)network be best suited for?
A) sending e-mail
B) downloading an RFC text file from the IETF web page
C) text messaging
D) carrying voice,data,and time-sensitive information

Accepted Answer

ATM networks are best suited for carrying voice, data, and time-sensitive information. It is designed to handle a high volume of short, bursty traffic such as multimedia, video conferencing, and real-time data transmission. It also provides Quality of Service (QoS) features to guarantee a certain level of service for different types of traffic. Sending emails, downloading a text file, and text messaging do not require the speed or QoS provided by an ATM network.

Question 16

Which cloud computing category refers to the use of software hosted on a service provider's network,and is usually subscription based?
A) Software as a service
B) Networking as a service
C) Platform as a service
D) Infrastructure as a service

Accepted Answer

Software as a service (SaaS) refers to the use of software applications hosted on a service provider's network, which can be accessed by users over the internet. SaaS is usually subscription-based, and users do not need to worry about maintaining or upgrading the software as the service provider handles these tasks. Examples of SaaS include Salesforce, Dropbox, and Google Apps.

Question 17

You're the network administrator for a large bean-bag chair company.You are presenting to your supervisor several reasons to make use of cloud computing for handling data processing.Which answer would be a valid benefit of using cloud computing?
A) always on,always available access independent of network status
B) reduced physical plant costs
C) increased use of localized resources
D) decrease in user application training time

Accepted Answer

Cloud computing can significantly reduce physical plant costs because it eliminates the need for extensive on-premises data centers, including the hardware and maintenance those facilities require.

Question 18

Multiprotocol Label Switching (MPLS)supports both IPv4 and IPv6,as well as other network layer protocols.

Accepted Answer

MPLS is capable of supporting multiple network layer protocols, including IPv4, IPv6, and others.

Question 19

A router is considered to be a CSU/DSU.

Accepted Answer

A router and a CSU/DSU serve different functions. A router is a networking device that forwards data packets between computer networks, while a CSU/DSU (Channel Service Unit/Data Service Unit) is a digital interface device used to connect data terminal equipment (DTE), such as a router, to a digital circuit, such as a T1 line.

Question 20

Which of the following is something X.25 does NOT offer?
A) SVCs
B) PVCs
C) error-free communication
D) 144 Mbps maximum throughput

Accepted Answer

X.25 does not offer a maximum throughput of 144 Mbps. This is a characteristic of ATM (Asynchronous Transfer Mode) technology. X.25 does offer SVCs (Switched Virtual Circuits), PVCs (Permanent Virtual Circuits), and error-free communication through its use of error correction and retransmission.

Quiz 10: Wide Area Networking and Cloud Computing

Select the true statement regarding analog and digital signals.

You have been asked to install a VPN remote access solution using Windows Server.What do you need to install?

Which cloud computing category allows a company to quickly provision additional disk space?

Which one of the following is NOT a typical SONET data rate?

Link Control Protocol is responsible for the setup of a PPP connection,as well as the termination of a connection when it has ended.

T-Carrier lines only require a CSU/DSU on the customer's side of the connection.

What is the local loop,or last mile?

Which of the following terms describes the category of cloud computing in which a customer develops applications using development tools and infrastructure provided by the service provider?

Packet switched WANs use virtual circuits to ensure that packets are delivered reliably and at the agreed-on bandwidth level.

Your local ISP has provided you with a dedicated line that has a Committed Information Rate of 1.54 Mbps.What does this mean?

Which statement about Multiprotocol Label Switching (MPLS) is true?

You are a network architect for an IT consulting company.One of your clients needs a WAN connection and has asked you about the disadvantage of a packet-switched WAN method.Which of the following is a disadvantage that applies?

Which of the following protocols is NOT used for Windows 7 VPN connections?

When would you most likely NOT choose to use a leased line connection?

What would an Asynchronous Transfer Mode (ATM) network be best suited for?

Which cloud computing category refers to the use of software hosted on a service provider's network,and is usually subscription based?

You're the network administrator for a large bean-bag chair company.You are presenting to your supervisor several reasons to make use of cloud computing for handling data processing.Which answer would be a valid benefit of using cloud computing?

Multiprotocol Label Switching (MPLS)supports both IPv4 and IPv6,as well as other network layer protocols.

A router is considered to be a CSU/DSU.

Which of the following is something X.25 does NOT offer?