Networking 9

​​time-shifted video

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

​​SS7 (Signaling System 7)

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

​Webcast

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

​NIC teaming​

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

​media gateway controller

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?​

​​PSTN (Public Switched Telephone Network)

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

private branch exchange PBX

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

syslog

What utility in Linux provides standards for generating, storing, and processing messages about events on a system?

QoS

is a measure of how well a network service matches its expected performance.

UDP

is preferred over TCP for real-time applications such as telephone conversations and videoconferencing.

​softphone

​A computer programmed to act like an IP telephone is known as a...

​video over IP

​IPTV, videoconferencing, streaming video, and IP multicasting belong to the range of services known as

unicast

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

True

​It is more difficult to transmit VoIP and video over IP signals over a packet-switched network than it is to transmit data signals.

AF (Assured Forwarding)​

​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.

EF (Expedited Forwarding)​

​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.

Top listeners

​One of your coworkers downloaded several, very large video files for a special project she's working on for a new client. When you run your network monitor later this afternoon, what list will your coworker's computer likely show up on?

​MPLS

​Which QoS technique operates at the OSI layer "2.5"?

​SIP

​You're trying to choose a signaling protocol for your company's network because you're about to upgrade to a VoIP system. You need to keep it simple because this is a small company with a simple network. Which protocol should you choose?

giant

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

Port 161

What port do SNMP agents listen on?

​Traffic policing

Your roommate has been hogging the bandwidth on your router lately. What technique can you use to limit the amount of bandwidth his computer can utilize at any one time?

CALEA (Communications Assistance for Law Enforcement Act)​

​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.

​network monitor

​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.

​Application layer

​RTP and RTCP operate at which layer of the OSI model?

​load balancing

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

​snmpgetnext

​What command retrieves the next record in an SNMP log?

​HIPAA

​What federal organization sets strict standards to protect the privacy of patient records?

​Softphone

​What kind of phone is a Skype app?

packet

​When a caller uses an IP telephone, his or her voice is immediately digitized and issued from the telephone to the network in ____ form.