Shared Flashcard Set

Details

Exam 2
n/a
85
Computer Networking
Undergraduate 4
05/29/2014

Additional Computer Networking Flashcards


 

 


 

Cards

Term
Dialed Number Identification Service (DNIS)
Definition
Describes dialed number information delivered to a voice processing device.
Term
Automatic Number Identification (ANI)
Definition
Describes caller ID information delivered to a voice-processing device.
Term
dial-peer
Definition
Logical configuration used to define dial plan information on a Cisco router.
Term
Foreign Exchange Office (FXO) ports
Definition
Analog interfaces that allow you to connect a VoIP network to legacy telephony networks such as the PSTN or a PBX system.
Term
Foreign Exchange Station (FXS) ports
Definition
Analog interfaces that allow you to connect a legacy analog telephony device to a VoIP network.
Term
Direct Inward Dial (DID)
Definition
A voice configuration that allows users from the PSTN to dial directly into an individual phone at an organization without passing through a receptionist or automated attendant application.
Term
Class of Restriction (COR)
Definition
The method used to implement calling restrictions in the CME environment. An inbound COR list assigns privileges, whereas an outgoing COR list restricts calling.
Term
local directory
Definition
The directory that is built automatically by the CME router as you define caller ID information for the ephone-dns.
Term
H.450.3
Definition

Industry-standard method of forwarding calls without hairpinning.

 

 

 

represents a method that allows the CME router to redirect the call directly to the final destination instead of acting as a tandem hop

Term
H.450.2
Definition
Industry-standard method of transferring calls without hairpinning.
Term
hairpinning
Definition
A problem that occurs when a call is transferred or forwarded from one IP phone to another that keeps the audio path established through the original IP phone; this tends to cause QoS issues with the call.
Term
call park
Definition
A Cisco Unified CME feature that allows you to park a call on hold in a virtual “parking spot” until it can be retrieved.
Term
call pickup
Definition
A Cisco Unified CME feature that allows you to answer another ringing phone in the network.
Term
directed pickup
Definition
A method used with call pickup to answer a phone directly by dialing the extension number of the ringing phone.
Term
local group pickup
Definition
A method used with call pickup to answer a ringing phone from within the local group of an IP phone.
Term
other group pickup
Definition
A method used with call pickup to answer a ringing phone from another group number, which must be specified after pressing the GPickUp softkey.
Term
Single Number Reach
Definition
A feature that allows users to have incoming calls ring another, preconfigured number after a defined time limit. Also allows for mobility, which allows the transfer of an active call to or from the same, preconfigured number.
Term
role (CUCM)
Definition
Defines a set of privileges to an application’s resources. Privileges may be defined as No Access, Read, or Update.
Term
user group (CUCM)
Definition
Associated with one or more roles. Users who members of a group inherit the privileges of the role(s) associated with the group. Membership in multiple groups may create conflicting privilege assignments; the enterprise parameter Effective Access Privileges for Overlapping User Groups and Roles defines whether the effective privilege is Maximum or Minimum.
Term
application (CUCM)
Definition
Includes CM Administration, Unified Serviceability, Cisco Extension Mobility, and so on. Each application has resources that roles are permitted or restricted from viewing and/or editing.
Term
resource
Definition
May be an administrative web page, part of a web page, or a tool or interface within an application.
Term
1. signaling   2. call progress tones  3. caller ID info
Definition
Three comon areas of configuration for FXS ports
Term
FXO ports
Definition
act as a trunk to the public switched telephone network (PSTN) central office (CO) or private branch exchange (PBX) systems
Term
ds0-group
Definition
T1/E1 CAS connections
Term
pri-group
Definition
T1/E1 CCS connections
Term
demultiplexing device
Definition
allows you to break the single T1 interface into multiple interfaces with specific channel assignments.
Term
Plain Old Telephone Service (POTS) dial peer
Definition
Defines voice reachability information for any traditional voice connection (that is, any device connected to an FXS, FXO, E&M, or digital voice port).
Term
Voice over IP (VoIP) dial peer
Definition
Defines voice reachability information for any VoIP connection (that is, any device that is reachable through an IP address).
Term
call leg
Definition
represents a connection to or from a voice gateway from a POTS or VoIP source.
Term
Digit-Stripping Rule of POTS Dial Peers
Definition
The router automatically strips any explicitly defined digit from a POTS dial peer before forwarding the call
Term
wildcard (.)
Definition
Matches any dialed digit from 0–9 or the * key on the telephone keypad. For example, 20.. matches any number from 2000 through 2099.
Term
Plus (+)
Definition
Matches one or more instances of the preceding digit. For example, 5+23 matches 5523, 55523, 555523, and so on. This trend continues up to 32 digits
Term
Brackets ([])
Definition
Matches a range of digits. For example, [1-3]22 matches 122, 222, and 322. You can include a caret (^) before the entered numbers to designate a “does not match” range.
Term
Wildcard (T)
Definition
Matches any number of dialed digits (from 0–32 digits).
Term
Comma (,)
Definition
Inserts a 1-second pause between dialed digits.
Term
Voice Activity Detection (VAD)
Definition
allows you to save bandwidth by eliminating voice traffic during periods of silence on the call.
Term
prefix digits
Definition
Allows you to specify digits for the router to add before the dialed digits.
Term
forward-digits number
Definition
Allows you to specify the number of right-justified digits to forward.
Term
num-exp
Definition
Transforms any dialed number matching the match string into the digits specified in the set string.
Term
voice translation profile
Definition
consisting of up to 15 rules to transform numbers however you want.
Term
preference command
Definition
allows the router to determine which dial peer it should use in the case where the destination patterns are identical. The router considers lower numbers to be better than higher numbers
Term
Quality of service
Definition
is the ability of the network to provide better or special service to a set of users and applications at the expense of other users and applications.
Term
delay
Definition
The time it takes a packet to move from the original starting point to the final destination
Term
Fixed delay
Definition
Delay values that you cannot change. For example, it takes a certain amount of time for a packet to travel specific geographical distances. This value is considered...
Term
Variable delay
Definition

Delay values that you can change.

 

For example, queuing delay (how long a packet waits in a router’s interface queue) is variable because it depends on how many packets are currently in the queue.

Term
Jitter (delay variations)
Definition

Describes packets that have different amounts of delay between them.

 

 

For example, the first voice packet of a conversation might take 100 ms to reach a destination, whereas the second voice packet might take 110 ms. There is 10 ms of delay variation (jitter) between these packets.

Term
Classification and Marking
Definition
These tools allow you to identify and mark a packet so network devices can easily identify it as it crosses the network.
Term
Congestion Management
Definition
which are typically the primary tools you will use to implement QoS network-wide. The queuing strategies define the rules the router should apply when congestion occurs
Term
congestion avoidance
Definition
The aim of these tools are to drop enough packets of non-essential (or not-as-essential) traffic to the network to avoid heavy congestion occurring in the first place
Term
policing
Definition
limits the amount of bandwidth certain network traffic can use
Term
link efficiency
Definition
this final group of tools focus on delivering the traffic in the most efficient way
Term
serialization process
Definition
the amount of time it takes the router to put the packet from its memory buffers onto the wire
Term
Weighted Fair Queuing (WFQ)
Definition
tries to balance available bandwidth among all senders evenly
Term
Class-Based Weighted Fair Queuing (CBWFQ)
Definition
This queuing method allows you to specify guaranteed amounts of bandwidth for your various classes of traffic
Term
Low Latency Queuing (LLQ)
Definition
the priority traffic always gets sent before any other guarantees are fulfilled
Term
auto qos voip
Definition
Enables AutoQoS without trusting any existing markings on packets. The router re-marks all traffic types using access lists or Network-Based Application Recognition (NBAR)
Term
local-consult method
Definition
uses a Cisco proprietary transfer method that performs a consult transfer if multiple lines or dual-line configurations are available, but will revert to blind transfers if only a single line is available
Term
intercom
Definition
administrative assistant presses the button, it speed dials the executive’s phone, which auto-answers the call on muted speakerphone
Term
barge-in
Definition
Automatically places an existing call on hold and causes the intercom to immediately answer
Term
no-auto-answer
Definition
Causes the phone to ring rather than auto-answer on speakerphone.
Term
no-mute
Definition
Causes the intercom to answer with unmuted speakerphone rather than muted.
Term
paging
Definition
provides only a one-way automatic path for communication
Term
Call Detail Records (CDR)
Definition
contain valuable information about the calls coming into, going out of, and between the IP phones on your network. These records contain all the information you need to find who called whom and how long they were talking.
Term
account and password defined at install for platform administration
Definition
used to access to Disaster Recovery System and the Operating System Administration pages
Term
application administration account and password defined during install
Definition
used to access the CM Administration, Serviceability, and Unified Reporting interfaces
Term
security password
Definition
This password is needed to connect to the Publisher database (for Subscriber servers or other Unified Communications applications that use the Publisher database)
Term
What is the difference between Feature services and Network services?
Definition

Network services are automatically activated and required for server operation 


Featured services are optional services that can be activated using the Service Activation page

Term
The Unified Operating System interface
Definition
allows an administrator to monitor and interact with the Linux-based operating system platform.
Term
Cisco Unified Reporting interface
Definition
gathers information from existing logs and formats the data into simple, useful, one-click reports
Term
What is in that SEP<mac_address.cnf.xml file?
Definition
The file contains a list of CUCM server, in order, that the phone should register with. It lists the TCP ports it should use for SCCP communication. It also lists the firmware version for each device model and the service URLs that each device should be using.
Term
device pools
Definition
provide a set of common configurations to a group of devices; like a template to apply several different settings all at once, quickly and accurately.
Term
CM Group
Definition
defines a top-down ordered list of redundant subscriber servers to which the phones can register
Term
region
Definition
a virtual assignment that allows the system designer to control the bit rate for calls
Term
common phone profile
Definition

includes settings that control the behavior of the phone, including the following:

 

  • DND settings
  • Phone personalization capabilities
  • VPN settings
  • USB port behavior
  • Video capabilities
  • Power-save options
Term
phone profile
Definition
allow for a one-time configuration of repetitive tasks; several types of profiles exist, and you can create many versions of each type to be applied to phones as needed.
Term
credential policy
Definition

defines preset passwords, end-user PINs, and application-user passwords

 

 applies the application password specified at install to all Application Users

Term
LDAP
Definition
a standards-based system that allows an organization to create a single, centralized directory information store where it holds information about user accounts, passwords, and user privileges
Term
LDAP sync
Definition
the user passwords are still managed in the CUCM database. This means that, although a user account in LDAP is replicated to the CUCM database, the user password must be maintained in both the LDAP system and in CUCM
Term
LDAP Authentication
Definition

redirects password authentication requests from CUCM to the LDAP system

 

it is typical and desirable to implement with LDAP Sync.

Term
call legs
Definition
call connections into or out of the voice gateway
Term
destination pattern
Definition
The actual matching of dialed digits is done by...
Term
Integrated Services (IntServ)
Definition
Uses the Resource Reservation Protocol (RSVP) to reserve bandwidth prior to the traffic flow starting
Term
Differentiated Services (DiffServ)
Definition
The most common method for QoS. Each device can be configured to respond to traffic using a variety of mechanisms and separate traffic into various classes
Term
Dial peer 0
Definition
like a default gateway dial peer
Term
link efficiency mechanisms
Definition
1. payload compression 2. header compression 3. LFI
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