Unit 3 Exam – Flashcards

A class ____ network class is reserved for special purposes. a. A b. B c. C d. D

In ____ addressing, the network information portion of an IPv4 address is limited to the first 8 bits in a Class A address. a. classful b. subnet c. stateful d. limited

In classful addressing, the Class B IPv4 address network ID is located in the ____. a. last 8 bits b. last 16 bits c. first 8 bits d. first 16 bits

In classful addressing, Class C IPv4 address host information is located in the ____. a. last 8 bits b. last 16 bits c. first 8 bits d. first 16 bits

Within a classful addressing subnet mask, the ____ bits indicate that corresponding bits in an IPv4 address contain network information. a. 0 b. 1 c. first eight d. last eight

Within a classful addressing, ____ is the default subnet mask for a Class C address. a. 255.255.255.255 b. 255.255.255.0 c. 255.255.0.0 d. 255.0.0.0

The result from ANDing 11001111 with 10010001 is ____. a. 11001111 b. 10010001 c. 10000001 d. 00000001

When using classful IPv4 addressing, a network ID always ends with an octet of ____. a. 0 b. 00000000 c. 1 d. 255

Because the octets equal to 0 and 255 are ____, only the numbers 1 through 254 can be used for host information in an IPv4 address. a. unobtainable b. out-of-range c. reserved d. open for general use

The ____ gateway is the gateway that first interprets its outbound requests to other subnets, and then interprets its inbound requests from other subnets. a. proxy b. core c. Internet d. default

The gateways that make up the Internet backbone are called ____ gateways. a. proxy b. core c. Internet d. default

In IPv4 addressing, each IP address is a unique ____ number. a. 12-bit b. 32-bit c. 64-bit d. 128-bit

In IPv4 addressing, a node with an IP address of 168.34.88.29 belongs to a Class ____ network. a. A b. B c. C d. D

In IPv4 addressing, an IP address whose first octet is in the range of 192-223 belongs to a Class ____ network. a. A b. B c. C d. D

In dotted decimal notation, a(n) ____ separates each decimal. a. dash c. colon b. slash d. period

The default subnet mask for a Class B network is ____. a. 255.0.0.0 c. 255.255.255.0 b. 255.255.0.0 d. 255.255.255.255

How many bytes are used for an IPv4 address? a. 4 b. 16 c. 31 d. 64

Suppose your computer's IP address is 155.61.9.188, and your network administrator has not subnetted the network to which you're connected. What is your computer's subnet mask? a. 255.0.0.0 b. 255.255.0.0 c. 255.255.255.0 d. 255.255.255.255

Suppose you send data to the 11111111 11111111 11111111 11111111 IP address on an IPv4 network. To what device(s) are you transmitting? a. Your own device b. All devices that are reachable c. All devices on your network segment d. Your domain name server

Suppose you send data to an address that begins with the Format Prefix FF0E on a network running IPv6. To what device(s) are you transmitting? a. All devices on your network segment b. All devices that are reachable c. Your own device d. Your domain name server

The____ field enables the network to discard a datagram that has been traveling the Internet for too long. a. Time to Live c. Total Length b. Service Type d. IP Options

The TCP header __ field contains a 32-bit value that counts bytes and indicates a packet's data position within the connection a. Source Port c. Sequence Number b. Padding d. Window

____ is a no-frills transport protocol that does not establish connections, does not attempt to keep data packets in sequence, and does not watch for datagrams that have existed for too long. a. Transport Control Protocol (TCP) b. User Datagram Protocol (UDP) c. Internet Control Message Protocol (ICMP) d. Network Address Translation (NAT)

The ____ is a large, distributed database of Internet addresses and domain names. a. Uniform Resource Locator (URL) c. Hypertext Transfer Protocol (HTTP) b. Domain Name System (DNS) d. Hypertext Markup Language (HTML)

____ is the capability of a network server to transmit a data stream to more than one host at a time. a. IP multicasting c. TCP broadcasting b. TCP unicasting d. ICMP multicasting

The ____ is an Internet protocol for sending and receiving e-mail and is used to perform the transfer. a. Address Resolution Protocol (ARP) c. File Transfer Protocol (FTP) b. Simple Mail Transfer Protocol (SMTP) d. Transport Control Protocol (TCP)

____ is actually a set of protocols named packet-based multimedia protocols, and it was designed for a wide range of applications (audio and video). a. H.121 c. H.256 b. H.232 d. H.323

____ involves the continuous download of a compressed audio or video file, which can then be heard or viewed on the user's workstation. a. Streaming audio and video c. File Transfer Protocol (FTP) b. Voice over IP d. XML

____ is a common application layer protocols that servers and the Internet use to deliver streaming audio and video data to a user's browser. a. Secure Shell (SSH) c. Real-Time Protocol (RTP) b. Transport Control Protocol (TCP) d. Voice over IP (VoIP)

One of the biggest changes to affect the Internet will be the continuing adoption of a new version of the Internet Protocol, version ____. a. IPv3 c. IPv5 b. IPv4 d. IPv6

If you are given the IPv4 address 1000 0001 1000 1101 0000 1100 1100 1111, what is that address in dotted decimal notation? a. 129.141.12.207 c. 2.4.2.6 b. 65.77.12.111 d. 65.77.8.110

Given the IPv4 address 162.48.128.0/24, how many addresses are available for the hosts? a. 64 c. 256 b. 128 d. 512

Which of the following is a voice-encoding technique in which the codec samples the actual voice signal at regular intervals in an attempt to predict the value of signal bits that have not yet arrived? a. Diffserv c. DSP b. DPCM d. EF

Which of the following is a PBX that is capable of accepting and interpreting digital signals? a. DSP c. digital PBX b. Diffserv d. NGN

Which of the following is a computer chip that codes and decodes voice signals? a. Digital signal processor (DPS) c. Media Control Unit b. IP telephone d. Media gateway

Which of the following is an ITU standard that specifies the type of pulse code modulation voice encoding used on the PSTN? a. G.723 c. G.711 b. G.726 d. G.728

Which of the following is a voice encoding and decoding method that borrows techniques from both waveform codecs and vocoders? a. Hybrid codec c. Softswitch b. Media gateway d. None of the above

Which of the following is an ITU standard that specifies voice encoding through adaptive differential pulse code modulation? a. G.723 c. G.728 b. G.726 d. G.729

Which of the following is a private switch that accepts and interprets digital voice signals? a. IP fax machine c. IP-PBX b. Media gateway d. MEGACO

A gateway that is capable of accepting connections from multiple devices, is known as: a. Media gateway c. Next generation network b. Fax gateway d. Media gateway controller

Which of the following is a computer that manages multiple gateways and facilitates the exchange of call information? a. Media gateway c. Media gateway controller b. MEGACO d. MCU

Which of the following is a protocol used for communication between media gateway controllers and media gateways? a. MCU c. MPLS b. MGCP d. NGN

Which of the following is responsible for controlling a session between two nodes? a. G.726 c. H.225 b. G.729 d. H.245

Which of the following is a protocol used between media gateway and controllers and media gateways? a. MEGACO c. MGCP b. RTP d. RSVP

Which of the following is a device that allows multiple video terminals to receive the same audio-video signals? a. MGCP c. MPLS b. Multipoint control unit d. Media gateway

Which of the following is a method of forwarding packets from one router to the next according to priority? a. Next generation network c. IP-PBX b. Multipoint control unit d. Multi-protocol Label Switching

Which of the following is a network that provides voice, video, and data services over the same infrastructure? a. RTP c. IP-PBX b. NGN d. RSVP

Which of the following is a Transport-layer protocol used with voice and video transmission? a. Real-Time Transport Protocol c. Resource Reservation Protocol b. Media Gateway Control Protocol d. None of the above

Which of the following is a technique that attempts to reserve a specific amount of network resources for a transmission before it occurs? a. Session Initiation Protocol c. Resource Reservation Protocol b. Media Gateway Control Protocol d. Real-Time Transport Protocol

Which of the following allows faxes to be attached to e-mail messages as TIFF files? a. T.36 c. T.38 b. T.37 d. T.39

Which of the following converts faxes to packets, and retransmits them to a sending fax gateway? a. T.37 c. T.39 b. T.38 d. T.40

Which of the following is a service that brings several communication services together in a single user interface? a. digitalPBX c. Unified messaging b. Call management d. Best effort

Which of the following is the act of issuing video signals from a server to a client in real time? a. Video terminal c. Video streaming b. Unified messaging d. Video bridge

Which of the following describes the real-time transmission of images and audio between two locations? a. Video streaming c. Unified messaging b. Vocoder d. Videoconferencing

Which of the following is a voice encoding and decoding technique that applies sophisticated mathematical models to voice samples? a. Waveform codec c. Vocoder b. Video bridge d. VON

Which of the following is a technique that attempts to reserve a specific amount of network resources for a transmission before it occurs? a. Session Initiation Protocol c. Resource Reservation Protocol b. Media Gateway Control Protocol d. Real-Time Transport Protocol

Which of the following is a service that brings several communication services together in a single user interface? a. digitalPBX c. Unified messaging b. Call management d. Best effort

MPLS and VPNs continue to replace which long-distance data services? a. Google and Yahoo c. frame relay and ATM b. Telnet and FTP d. frame relay and FTP

_-------------_ is the term for the convergence of real-time and non-real-time communications services such as telephony, instant messaging, video conferencing, speech recognition, voice mail, and email into a single interface. a. Big Bundle c. Unified communications b. AT&T d. Frame relay

SMTP operates from port ____. a. 25 c. 110 b. 11 d. 250

What is the difference between VoIP and Internet Telephony? a. VoIP uses QoS techniques, but Internet Telephony cannot. b. VoIP requires IP telephone clients, but Internet Telephony allows clients to be computers, analog Telephones, or IP telephones. c. VoIP applies to any type of network, not just the Internet. d. They are the same thing.