N+ Ch 9

Front 1

​A streaming video, either on demand or live, that is delivered via the Web.

Back 1

Webcast

Front 2

​A type of link aggregation in which two or more NICs work in tandem to handle traffic to and from a single node.

Back 2

​NIC teaming

Front 3

​One of two DiffServ forwarding specifications. It assigns each data stream a minimum departure rate from a given node. This technique circumvents delays that slow normal data from reaching its destination on time and in sequence.

Back 3

EF (Expedited Forwarding)​

Front 4

​A software-based tool that monitors traffic on the network from a server or workstation attached to the network. It can typically interpret up to Layer 3 of the OSI model.

Back 4

​network monitor

Front 5

​One of two DiffServ forwarding specifications. It allows routers to assign data streams one of several prioritization levels, but it provides no guarantee that, on a busy network, messages will arrive on time or in sequence. It is specified in the DiffServ field in an IPv4 packet.

Back 5

AF (Assured Forwarding)​

Front 6

​A U.S. federal regulation that requires telecommunications carriers and equipment manufacturers to provide for surveillance capabilities. It was passed by Congress in 1994 after pressure from the FBI, which worried that networks relying solely on digital communications would circumvent traditional wiretapping strategies.

Back 6

CALEA (Communications Assistance for Law Enforcement Act)​

Front 7

​A set of standards established by the ITU for handling call signaling on circuit-switched portions of the PSTN (Public Switched Telephone Network).

Back 7

​SS7 (Signaling System 7)

Front 8

​The distribution of traffic over multiple components or links to optimize performance and fault tolerance.

Back 8

​load balancing

Front 9

​The network of lines and carrier equipment that provides telephone service to most homes and businesses.

Back 9

​PSTN (Public Switched Telephone Network)

Front 10

​A broadcast that is delayed by a few minutes to allow for editing processes and licensing concerns.

Back 10

​time-shifted video

Front 11

A computer that provides support for multiple H.323 terminals and manages communication between them is known as what term below?

Back 11

​MCU

Front 12

A highly available server is available what percentage of the time?​

Back 12

​99.99%

Front 13

A server running the SIP protocol listens on what TCP/UDP port for unsecured communications?​

​5060

Back 13

​5060

Front 14

​In a VoIP call, what method of transmission is used between two IP phones?

Back 14

unicast

Front 15

In H.323, which protocol below handles call or videoconference signaling?​

Back 15

​H.225

Front 16

In order for gateways to exchange and translate signaling and control information with each other so that voice and video packets are properly routed through a network, what intermediate device is needed?​

Back 16

​media gateway controller

Front 17

​On circuit switched portions of a PSTN, what set of standards established by the ITU is used to handle call signaling?

Back 17

​SS7

Front 18

​Packets that are smaller than a medium's minimum packet size are known by what term below?

Back 18

​runts

Front 19

Packets that exceed the medium's maximum packet size are known by what term?​

Back 19

​giants

Front 20

SNMP agents receive requests from an NMS on what port number?​

Back 20

​161

Front 21

The Priority Code Point field in a frame consists of how many bits?​

Back 21

​3 bits

Front 22

​What component of SIP is a server that responds to user agent clients' requests for session initiation and termination?

Back 22

​user agent server

Front 23

What percentage of Internet traffic, as estimated by Cisco Systems, will be devoted to video traffic by 2018?​

Back 23

​79%

Front 24

What protocol enables multiple types of Layer 3 protocols to travel over any one of several connection-oriented Layer 2 protocols?​

Back 24

​MPLS

Front 25

What security standard below was created to protect credit card data and transactions, requiring network segmentation as part of security controls?​

Back 25

​PCI DSS

Front 26

​What two log files are used by older versions of Unix and newer version of Linux to store log information?

Back 26

​/var/log/messages, ​/var/log/syslog

Front 27

​What two terms below are used to describe an analog-to-digital voice conversion device that accepts and interprets both analog and digital voice signals?

Back 27

IP PBX​, ​digital PBX

Front 28

What two terms below are used to describe a telephone switch that connects and manages calls within a private organization?​

Back 28

​private branch exchange, ​PBX

Front 29

What two terms below describe a network device with three ports, two of which send and receive all traffic, and the third port mirrors the traffic?​

Back 29

​network tap, packet sniffer​

Front 30

What two terms below describe the process of manipulating certain characteristics of packets, data streams, or connections to manage the type and amount of traffic traversing a network or interface at any moment?​

Back 30

traffic shaping​, ​packet shaping

Front 31

When a device handles electrical signals improperly, usually resulting from a bad NIC, it is referred to by what term below?​

Back 31

​jabber

Front 32

When using DiffServ, what type of forwarding utilizes a minimum departure rate from a given node, which is then assigned to each data stream?

Back 32

expedited forwarding​

Front 33

When using SIP, what term is used to describe end-user devices, which may include workstations, tablet computers, smartphones, or IP phones?​

Back 33

​user agent client

Front 34

​Which element of H.323 is a device that provides translation between network devices running the H.323 signaling protocols and devices running other types of signaling protocols?

Back 34

​H.323 gateway

Front 35

Which of the following is not a requirement in order to use a softphone?​

Back 35

​A wireless carrier to handle the voice path.

Front 36

CALEA requires telecommunications carriers and equipment manufacturers to provide for surveillance capabilities.​

Back 36

True

Front 37

Most UNIX and Linux desktop operating systems provide a GUI application for easily viewing and filtering the information in system logs.

Back 37

True

Front 38

TCP is preferred over UDP for real time services.​

Back 38

False

Front 39

The SNMP version 3 protocol introduces authentication, validation, and encryption for messages exchanged between devices and the network management console.​

Back 39

True

Front 40

Wireshark or any other monitoring software running on a single computer connected to a switch doesn't see all the traffic on a network, but only the traffic the switch sends to it, which includes broadcast traffic and traffic specifically addressed to the computer.​

Back 40

True