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Telecom - Lecture notes 1-7

Telecom - Lecture notes 1-7
Academic year: 2020/2021
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Arkansas State University

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Which VoIP device helps establish the connection between two VoIP phones? VoIP server

What are other names fr a VoIP server IP-PBX VoIP PBX

What is one benefit of placing VoIP gateways in geographically separated branch offices that have an existing WAN connection? Long-distance PSTN charges can be reduced by switching VoIP calls to the PSTN in locations where only local call charges would be incurred

When would you consider changing the codec used in your VoIP system? When VoIP data consumes too large a portion of your network bandwidth. When sound quality is poor.

How can QoS be configured so that large data transfers will not block VoIP calls by using too much network bandwidth? QoS can be configured on network devices to give priority to VoIP traffic.

Upper management has asked you if there is a way to integrate phone calls, emails, and instant messaging into a single platform. Which of the following systems should you recommend? Unified communication

Which of the following protocols is an open source protocol used by most manufacturers of VoIP systems? Session initiation protocol (SIP)

Which of the following protocols are used by VoIP to set up, maintain, and terminate a phone call? SIP

Your company uses VoIP for phone calls. Recently, employees have been complaining about phone calls with unusual sound effects. Which type of problem is occurring on the VoIP system? Jitter

You are on a phone call using VoIP. You notice that it takes several seconds for the person on the other end to respond to questions you ask. Which type of problem is occurring? Latency

What is a soft phone? A software application that runs on a computer or other device that accesses a VoIP server to make real-time phone calls.

Which switch features are typically used with VoIP? Power over Ethernet (PoE) Virtual LAN (VLAN)

Which of the following features is used with digital IP phones to supply power through a switch port? Power over Ethernet (PoE)

In virtualization, what is the role of a hypervisor? A hypervisor allows virtual machines to interact with the hardware without going through the host operating system.

What type of virtualization completely simulates a real physical host? Full Virtualization

Which component is most likely to allow physical and virtual machines to communicate with each other? Virtual switch

Which of the following are advantages of virtualization? Centralized administration Easy migration of systems to different hardware

You need to provide DHCP and file share services to a physical network. These services should be deployed using virtualization. Which type of virtualization should you implement? Virtual servers

You are an application developer. You use a hypervisor with multiple virtual machines installed to test your applications on various operating system versions and editions. Currently, all of your testing virtual machines are connected to the production network through the hypervisor's network interface. However, you are concerned that the latest application you are working on could adversely impact other network hosts if errors exist in the code. To prevent this, you decide to isolate the virtual machines from the production network. However, they still need to be able to communicate directly with each other. What should you do? Create a new virtual switch configured for host-only (internal) networking. Connect the virtual network interfaces in the virtual machines to the virtual switch.

Flexibility - Moving virtual machines between hypervisor hosts Testing - Verifying that security controls are working as designed Server consolidation - Performing a physical-to-virtual migration (P2V) Sandboxing - Isolating a virtual machine from the physical network

You are responsible for maintaining Windows workstation operating systems in your organization. Recently, an update from Microsoft was automatically installed on your workstations that caused an in-house application to stop working.

Step 2- Deploy a Fibre Channel switch. Step 3- Connect each server to the Fibre Channel switch using the appropriate fiber optic cabling for the equipment you are using. Step 4- Deploy a shared storage device, such as an external RAID device containing multiple hard disk drives

Which of the following does NOT accurately describe an iSCSI SAN? Requires special hardware and knowledge to implement.

you manage a network with three dedicated storage devices, as shown in the diagram. Users on the network see only a single file server. Which network-based storage technology is being used? NAS with Clustering.

Which of the following are typical components of a NAS device? select two A minimal network OS. One or more NICs.

In a SAN implementation, the servers that connect to shared storage devices are called___________________. initiators

An access point that conforms to the IEEE 802 standard acts most closely to what other networking device? Hub

uses a narrow FHSS

Breaks data into pieces DSSS

Breaks data into very small data OFDM

Which of the following is true of a wireless network SSID? Groups wireless devices together into the same logical network

Which wireless networking component is used to correct multiple APs together? DS

All of the 802 standards for the wireless networking support which type of communication path sharing technology? CSMA/CA

What is the frequency of 802 networking? 5

802 b and 802 2 GHz and 11 channels

How many total channels are available for 802 wireless networks? 23

Your organization uses an 802 wireless network. Recently, other tenants installed the following equipment in your building

  • A wireless television distribution
  • A wireless phone system running at 5 GHz
  • A wireless phone system running at 900 MHz
  • An 802 wireless network running in the 5 - 5 GHz frequency
  • An 802 wireless network running in the 4 - 5 GHz frequency range The wireless TV system

Which of the following are frequencies defined by 802 committees for wireless networking? 2 GHz 5 GHz

Which IEEE standard describes wireless communication? 802

Which data transmissions rate is defined by the IEEE 802 wireless standard? 11 Mbps

802 – 2 Mbps 802 – 56 Mbps 802 – 10 Mbps

You are dragging a wireless network for a client. Your client needs the network to support a data rate of at least 54 Mbps. In addition, the client already has a wireless telephone system installed that operates 2 GHz.

Which 802 standard will work best in this situation? 802 (54 Mbps same as 802 but g operates in 2 and a in 5)

You are designing an update to your client's wireless network. The existing wireless network uses 802 equipment; which your client complains runs too slowly. She wants to upgrade the network to run at 54 Mbps.

Due to budget constraints, your client wants to upgrade only the wireless access points in the network this year. Next year, she will upgrade the wireless network boards in her users' workstations. She has also indicated that the system must continue to function during the transition period.

You have a small wireless network that uses multiple access points. The network uses WPA and broadcasts the SSID. WPA2 is not supported by the wireless access points. You want to connect a laptop computer to the wireless network. Which of the following parameters will you need to configure on the laptop? (Select two.) TKIP encryption Preshared key

What is the risk associated with smart technology used in network devices such as smart refrigerators, environmental controls, or industrial equipment? They are vulnerable to exploits due to weaker security.

Which protocol is well known for its use in the the home security and home automation industry, uses a mesh topology, makes devices act as repeaters, and has a low data transfer rate? Z-Wave

to optimize your network, you want to configure your wireless AP to use a channel that meets the following criteria:

  • Non-overlapping
  • Low utilization
  • Low interference You performed a spectrum analysis to identify 2 GHz wireless channel utilization, as shown in the exhibit. (To read the spectrum analysis, imagine a line coming down from the center of the highest point of each wave. For example, the four waves whose crests are over channel 11 belong to channel 11.) Based on the results, which channel should you configure your wireless AP to use? Channel 1

your wireless network consists of multiple 802 access points that are configured as follows:

  • SSID (hidden): CorpNet
  • Security: WPA2-PSK using AES
  • Frequency: 5 GHz
  • Bandwidth per channel: 20 MHz This network is required to support an ever-increasing number of devices. To ensure there is sufficient capacity, you want to maximize the available network bandwidth. What should you do? Double the bandwidth assigned per channel to 40 MHz.

You are designing an update to your client's wireless network. The existing wireless network uses 802 equipment, which your client complains runs too slowly. She wants to upgrade the network to run at 150 Mbps or faster. Due to budget constraints, your client wants to upgrade only the wireless access points in the network this year. Next year, she will upgrade the wireless NICs in the workstations. She has also indicated that the system must continue to function during the transition period. Which 802 standard will work best in this situation?

802

You are designing a wireless network for a client. Your client needs the network to support a data rate of at least 150 Mbps. In addition, the client already has a wireless telephone system installed that operates 2 GHz. Which 802 standard will work best in this situation? 802

ou are designing a wireless network for a client. Your client needs the network to support a data rate of at least 54 Mbps. In addition, the client already has a wireless telephone system installed that operates at 2 GHz. Which 802 standards will work best in this situation? (Select two.) 802 n and a

you have been hired to design a wireless network for a SOHO environment. You are currently in the process of gathering network requirements from management. Which of the following questions should you ask? (Select three.) What type of data will be transmitted on the network? Is the size of the business expected to grow in the future? How many devices will need to be supported?

What purposes does a wireless site site survey fulfill? (Choose two.) To identify existing or potential sources of interference. To identify the coverage area and preferred placement of access points.

Which of the following enterprise wireless deployment models uses access points with enough intelligence to allow for the creation of quest WLANs for keeping public wireless traffic separated from private traffic? Distributed wireless mesh infrastructure quizlet/149219969/1055-practice-exam-flash-cards/

Which of the following wireless security methods uses a common shared key configured on the wireless access point and all wireless clients? WEP, WPA Personal, and WPA2 Personal

What is the LEAST secure place to locate an access point with an omni-directional antenna when creating a wireless cell? Near a window

Which of the following measures will make your wireless network inviable to the casual attacker performing war driving? Disable the SSID broadcast

Which of the following provides security for wireless networks? WPA2.

Place WAP's above where most clients are.

OC-3 155 Mbps 1- 51. 12- 622 24- 1 Gbps 48- 2. 192- 9.

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Telecom - Lecture notes 1-7

Course: Telecommunications And Networking Essentials (CIT 2523)

University: Arkansas State University

Was this document helpful?
Which VoIP device helps establish the connection between two VoIP phones?
VoIP server
What are other names fr a VoIP server
IP-PBX
VoIP PBX
What is one benefit of placing VoIP gateways in geographically separated branch offices
that have an existing WAN connection?
Long-distance PSTN charges can be reduced by switching VoIP calls to the PSTN in locations
where only local call charges would be incurred
When would you consider changing the codec used in your VoIP system?
When VoIP data consumes too large a portion of your network bandwidth.
When sound quality is poor.
How can QoS be configured so that large data transfers will not block VoIP calls by
using too much network bandwidth?
QoS can be configured on network devices to give priority to VoIP traffic.
Upper management has asked you if there is a way to integrate phone calls, emails, and instant
messaging into a single platform.
Which of the following systems should you recommend?
Unified communication
Which of the following protocols is an open source protocol used by most manufacturers of VoIP
systems?
Session initiation protocol (SIP)
Which of the following protocols are used by VoIP to set up, maintain, and terminate a phone
call?
SIP
Your company uses VoIP for phone calls. Recently, employees have been complaining about
phone calls with unusual sound effects.
Which type of problem is occurring on the VoIP system?
Jitter
You are on a phone call using VoIP. You notice that it takes several seconds for the person on the
other end to respond to questions you ask.
Which type of problem is occurring?
Latency
What is a soft phone?
A software application that runs on a computer or other device that accesses a VoIP server to
make real-time phone calls.

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