Network plus chapter 9

Application layer

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

time-shifted video

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

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?

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?

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.

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.

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

Port 161

​​ What port do snmp agents listen on?

Soft phone

What kind of phone is a Skype app?

MPLS

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

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.

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).

​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?

Load balancing

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

PSTN (Public Switched Telephone Network)

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

snmpgetnext

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

Hippa

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

Syslog

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