Exam 2 Study Guide Key Terms and Review Questions

ISAKMP

Works within the internet key exchange to establish policy for managing cryptographic keys

Cable performance tester

tool used to check cable functionality and identify termination points or damage

Fiber cleaver

tool used to cut a clean slice through fiber strands

Media converter

tool used to interconnect UTP to SMF

OPM

tool used to measure the amount of light power transmitted on a fiber-optic line

Fusion splicer

tool used to melt the tips of two fibers together for clean light transmission

Multimeter

tool used to test resistance, voltage, or impedance of a cable

Bandwidth

amount of data you can theoretically transmit during a given period of time

SSH

A collection of protocols that offer secure connection to remote endpoints

Telnet

A remote access protocol that transfers data in clear text

RDS

Allows users to access a single application on a Windows endpoint

Digital Certificate

File containing user's verified identity and their public cryptographic key

Loopback Adapter

Hardware device used for troubleshooting network transmission issues

ESP

IPSec encryption method that encrypts the entire IP packet

Identification

IPv4 field used to identify and reassemble IP fragments

RJ11W

Indicates Wall in RJ11W connector

Certificate authority

Issues, revokes, and validates digital certificates

Symmetric encryption

Sender and receiver use the same cryptographic key to encrypt and decrypt data

IEEE Standard 802.3

Standard against which Ethernet cabling specifications are measured

Acknowledgment number

TCP header field that confirms receipt of data via return message to the sender

Window size

TCP header field that indicates the size of the receiver's TCP buffer

Checksum

TCP header field used to determine if the segment was corrupted during transmission

HTTPS

TCP-based protocol using port 443

HTTP

TCP-based protocol using port 80

Throughput

Data rate defining the amount of data transmitted in a specific time

40GBASE-T

Data transmission rate of 40Gbits/s

SQL

Database installed on server using TCP port 1433

Optical Time-Domain Reflectometer (OTDR)

Device used to test a fiber cable for faults and length

RDP

Protocol used for secure remote management of Windows device

POP3

Protocol used on mail client software causing old emails to disappear

LDAP

Protocol used to integrate firewall with Active Directory

DNS

Protocol using UDP port 53 for name resolution

DHCP

Protocol using UDP ports 67 and 68 for IP address allocation

AH

Provides authentication of the IP packet payload

RDP

Provides graphical user interface to Windows endpoint

Transport mode

Provides layer 3 security between two endpoints

Twists

Purpose of twists in Twisted Pair cable: reduce noise (crosstalk)

Cable labels

Required for organized cable management solution

Cable ties

Required for organized cable management solution

Color-coded cables

Required for organized cable management solution

Direct Access and VPN (RAS)

Role service to be installed for Remote Access role on a Windows server

Asymmetric encryption

Sender and receiver use different cryptographic keys to encrypt and decrypt data

Multimode fiber-optic cable(MMF)

Cable using light-emitting diodes to transmit multiple signals

Console Cable

Cable with RJ45 (male) at one end and DB9 (female) connector at the other end

Rollover Cable

Cable with RJ45 (male) at one end and DB9 (female) connector at the other end

Increased attenuation

Cause of evident loss of decibel

ifconfig eth0

Command to determine IP configuration of eth0 network interface on Linux device

ip address show eth0

Command to determine IP configuration of eth0 network interface on Linux device

tracert

Command to determine the route to reach a destination IP address

arp -a

Command to display address resolution table on Windows device

route print

Command to display local routing table on Windows device

Site-to-Site VPN

Connection method for connecting company's offices in different geographical areas

Connector

Major part of a BIX punchdown block system

Mount

Major part of a BIX punchdown block system

CAT1

Maximum speed of up to 1 Mbps for CAT1 cable

IKE

Negotiates the exchange of cryptographic keys

VNC

Open source remote access software based on the cross-platform RFB protocol

Tunnel mode

Operates on intermediary devices to support VPNs

ping -t

Parameter to send a constant stream of packets using ping command on Windows device

Authentication

Permission allowing user access to a resource

Network Access permissions

Permission needed to connect to a VPN connection

Total Internal Reflection

Phenomenon used by light waves in Fiber Optic cables for transmission

Port 22

Port on which SSH listens

Leased Line

Preferred internet connection for guaranteed uptime

Key encryption

Process of converting clear text into ciphertext using a random string of characters

FTPS

Protocol that adds an extra layer of protection and encrypts FTP's data and control channels

Ethernet

Protocol that creates a frame around the payload by adding both a header and a trailer

Cable Crimper

Tool used to connect a media connector to the end of a cable

Cable Tester

Tool used to test an Ethernet cable and create a loopback connection

Multimeter

Tool using red and black probes to measure voltage

Satellite

Type of Internet Service Providers used by Airlines for in-transit internet services

Riser-rated

Type of cable used in elevator shafts to prevent fire

Out-of-band management

Utilizes USB port on device for management

In-band management

Utilizes the network infrastructure to access remote device

mGRE

VPN protocol that supports multiple tunnel destinations on a single interface

Split tunnel VPN

VPN type that only encrypts network traffic destined for the corporate office

UTP cable

cable consisting of one or more insulated wire pairs encased in a plastic sheath and is less resistant to noise

RTT

common method to measure data network latency

encoding

converting data into a digital signal for transmission

250 watts

throughput received at the moment with a total signal strength of 1000 watts and 6 dB loss

latency

delay between sending a signal and it arriving at the destination

MMF

fiber cable type that experiences greater attenuation and is not suited for long distance

SMF

fiber cable type that supports high bandwidth over long distances

LC

fiber connector used for connecting ferrules of an SMF cable that measures 1.25 mm

attenuation

loss of signal strength as it travels away from its source

FDM

multiplexing technology that modulates signals into different frequencies for simultaneous transmission

WDM

multiplexing technology used with fiber-optic cable

DWDM

multiplexing technology using fiber-optic cables that increases the number of channels up to 320 channels

TDM

multiplexing type that divides a channel into multiple intervals of time

Low cost

not a characteristic of fiber cable

Jitter

packets experiencing varying amounts of delay

Effective throughput

point to emphasize for TIA/EIA certification of twisted-pair cables

Giga

prefix for a quantity of 1,000,000,000 bits per second

modulation

sending data over an analog signal

crosstalk

signal traveling down one wire infringes on the signal of adjacent wire