Technology

Question 0

RAI

Answer 0

• Remote Alarm Indication (Yellow Alarm).

* Indicates a transmission problem at the far end.

Question 1

AIS

Answer 1

• Alarm Indication Signal.
• All ones (blue alarm).
• Indicates a problem upstream from the interface.

Question 2

LOF

Answer 2

• Loss of Frame (red alarm).

* Receiving the incorrect framing type or errors in the incoming framing pattern.

Question 3

OCN

Answer 3

• Operating Company Number
• Four character ID for North American phone companies.
• Assigned by NECA and used in the LERG.

Question 4

ENUM

Answer 4

• E.164 Number to URI Mapping

* Uses DNS NAPTR resource records

Question 5

TCP 3-Way Handshake

Answer 5

• SYN
• SYN-ACK
• ACK

Question 6

DS3 Scrambling

Answer 6

• Randomizes the pattern of 1s and 0s to maintain clocking.

* Must be configured on both ends or CRC errors will occur.

Question 7

Basic SIP Call Flow

Answer 7

• INVITE –>
• 100 Trying
• 2-way RTP cannel
• BYE

Question 8

Distance-Vector Routing Protocol

Answer 8

Calculates hop count to determine the route.

Question 9

RIP

Answer 9

• Routing Information Protocol

* Distance-vector routing protocol with a maximum hop count of 15 to prevent routing loops.

Question 10

Split Horizon Route Advertisement

Answer 10

• Prevents routing loops in distance-vector routing protocols.
• Prohibits a router from advertising a route back onto the interface from which it was learned.

Question 11

SIP RFC

Answer 11

RFC 3261

Question 12

PAI

Answer 12

• P-Asserted Identity

* Conveys the identity of the originator of a request within a trusted network.

Question 13

Private IP Space

Answer 13

• RFC 1918
• 10.0.0.0 - 10.255.255.255
• 172.16.0.0 - 172.31.255.255
• 192.168.0.0 - 192.168.255.255

Question 14

A Record

Answer 14

• Address Record

* Links a domain name to an IP address

Question 15

MX Record

Answer 15

• Mail Exchange Record

* Directs e-mail to servers for a domain

Question 16

NS Record

Answer 16

• Name Server Record

* Indicates which name servers are authoritative for a domain

Question 17

Two main classes of routing protocols

Answer 17

• Distance-vector

* Link-state

Question 18

LERG

Answer 18

• Local Exchange Routing Guide
• Contains information on every telephone switch in North America and he numbers they cover
• Teclordia maintains the database

Question 19

Route Reflector

Answer 19

• Ease the full mesh limitations of iBGP

* Allows one router to advertise, or reflect, iBGP routes to other iBGP speakers.

Question 20

B8ZS

Answer 20

• Bipolar 8-Zero Substitution
• Allows the use of the full 64 Kbps for each channel in a T1
• Encoding method used on T1 circuits that inserts two successive ones of the same voltage - referred to as bipolar violation - into a signal whenever eight consecutive zeros are transmitted
• Successive ones are ordinarily transmitted with a positive voltage and a negative voltage

Question 21

G.711

Answer 21

• ITU-T standard CODEC

* 8 bit speech samples at 8000 samples per second, giving 64 Kbps of digital speech data

Question 22

DOCSIS

Answer 22

• Data Over Cable Service Interface Specification

* Developed by CableLabs and contributing companies

Question 23

DOCSIS 3.0

Answer 23

• Faster Upstream and Downstream

• Modular CMTS
• Channel bonding
• Dynamic Frequency Assignment
• Enhanced Security
• Lower latency and reduced packet loss
• Support for IPv6

Question 26

WiFi

Answer 26

• IEEE 802.11

Question 27

IPv6

Answer 27

• 128 bit address

Question 28

DHCP

Answer 28

* Dynamic Host Configuration Protocol * Client server messaging DHCPDISCOVER --> DHCPOFFER DHCPACK -->

Question 29

Voltage

Answer 29

* Electrical potential | * Measure of force in an electric system

Question 30

OSI Layer SIP Resides

Answer 30

Application Layer

Question 31

SIP Responses

Answer 31

* 1xx Provisional 100 Trying * 2xx Successful 200 OK * 3xx Provisional 302 Moved Temp * 4xx Client Error 404 Not Found * 5xx Server Error 504 Server Time-out * 6xx Global Failure 603 Decline

Question 32

Ohms

Answer 32

* Electrical resistance * Resistance of a light bulb filament is high so a lot of heat and light are produced as the electricity forces it's way through

Question 33

Amps

Answer 33

* Electrical current * Measure of how many electrons are flowing through a circuit * The result of a fixed voltage (force) pushing on a circuit of fixed resistance

Question 34

Short Circuit

Answer 34

An accidental path is created in a circuit, generating a connection where one did not exist before; e.g., circuits cross.

Question 35

Watts

Answer 35

* Electrical energy | * a measure of the rate of electrical energy being used (consumed or released)

Question 36

IPDR

Answer 36

* Internet Protocol Detail Record * Provides information about IP-based usage * Part of CableLabs DOCSIS OSS definitions

Question 37

Electricity

Answer 37

The movement of charged atomic particles called electrons

Question 38

Battery

Answer 38

* A chemical device designed to create the force needed to move electrons * Electrons have a negative charge * Electrons are travel out of the negative end of a battery and are attracted to the positive end

Question 39

CAS

Answer 39

* Common Associated Signaling | * Replaced by SS7

Question 40

IDMS

Answer 40

Integrated Database Management System

Question 41

Spanning Tree Protocol

Answer 41

Prevents bridging loops at the data link layer

Question 42

NEBS

Answer 42

* Network Equipment Building System * Developed by Bell Labs in the 1970s to standardize equipment that would be installed in a CO * Telcordia manages the NEBS specifications

Question 43

Path Vector

Answer 43

* BGP is considered a path vector routing protocol | * BGP messages contain complete routes

Question 44

E.164

Answer 44

* ITU-T recommendation that defines the international public telecommunications numbering plan used in the PSTN. * Defines the format of telephone numbers

Question 54

Ethernet

Answer 54

• IEEE 802.3

Question 55

Impedence

Answer 55

Impedance is the total resistance of an AC circuit