Exam 2 Study Guide Key Terms and Review Questions (makes the most sense)
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
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
Network layer
At which OSI layer does IP operate?
Sequence number
Field in TCP segment that identifies the data segment's position in the stream
Urgent pointer
Field in TCP segment to specify a more urgent section of the data stream
Digital Certificate
File containing user's verified identity and their public cryptographic key
ESP
IPSec encryption method that encrypts the entire IP packet
Identification
IPv4 field used to identify and reassemble IP fragments
RG-6 cables
Ideal cables for distributing video signals to multiple monitors
Replace the cables using an MT-RJ connector
Ideal connector for replacing SMF cables with MMF cables
Tone locator
Instrument used to detect faulty fiber-optic cables
Certificate authority
Issues, revokes, and validates digital certificates
NEXT
Kind of crosstalk that occurs near the source of the signal
STDM
Kind of multiplexing that assigns slots to nodes according to priority and need
Renegotiate and reestablish the connection before the current session gets timed out
Step to complete after establishing a secure channel in IPsec suite
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
Cat 6a
Earliest twisted-pair cabling standard for 10GBASE-T transmissions at 100 meters
Fiber stripper
Tool used to strip off the outer layer of a fiber cable
Bandwidth
Transmission characteristic that is never fully achieved (excluding Throughput)
Checksum
What field in a TCP segment ensures data integrity?
ISAKMP
Works within the internet key exchange to establish policy for managing cryptographic keys
Bandwidth
amount of data you can theoretically transmit during a given period of time
UTP cable
cable consisting of one or more insulated wire pairs encased in a plastic sheath and is less resistant to noise
Port 22
Port on which SSH listens
MT-RJ
Fiber connector containing two strands of fiber in each ferrule
Symmetric encryption
Sender and receiver use the same cryptographic key to encrypt and decrypt data
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
Asymmetric encryption
Sender and receiver use different cryptographic keys to encrypt and decrypt data
Passive twinaxial cable
Cable best suited for ultra-high-speed connections between a router and a switch on the same rack
SSH
Collection of protocols that performs both authentication and encryption
White/green
Color of the wire that goes in the first pin when creating patch cables for a government office (excluding White/orange)
Key pair
Combination of a public key and a private key
arp -d
Command that flushes or deletes entries in the ARP cache
Set the SYN to 1 byte in the flag segment of the TCP segment
Command to synchronize sequence numbers between two nodes
tcpdump
Command-line interface to analyze network traffic
Wavelength mismatch
Common fiber connection problem causing severe attenuation
300871
Computer A started a communication sequence with Computer B that has a sequencing number of 300070. Computer B accepted the request and sent an acknowledgment number of 300071. Until this point, no payload has been exchanged. So far, the sequence numbers have increased by exactly 1 in each acknowledgment. Now, Computer A sends a payload data that is 800 bits long. According to you, what will be the acknowledgment number for the return message in this case?
GRE
Layer 3 VPN tunneling protocol developed by Cisco
Network Layer
Layer whose header identifies the IP address of the destination host
100 Mbps (Fast Ethernet)
Maximum bandwidth provided by TIA/EIA-568 Category 5 twisted pair
IKE
Negotiates the exchange of cryptographic keys
Bandwidth
Number of data bits received across a connection each second
VNC
Open source remote access software based on the cross-platform RFB protocol
Tunnel mode
Operates on intermediary devices to support VPNs
Tone locator
Part of a toner and probe kit that emits an audible tone when detecting electrical activity on a wire pair
Port 69
Port used for transferring boot files using the file transfer protocol
Key encryption
Process of converting clear text into ciphertext using a random string of characters
GRE
Protocol for transmitting IP and other messages through a tunnel
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
TFTP
Protocol that is not a terminal emulation protocol
VNC
Protocol that uses RFB to remotely control a workstation
Full-duplex
Transmission that allows a signal to travel in both directions simultaneously
Use a Category 5e cable for this scenario
Twisted cable pair to be used for 1000BASE-T standard Fast Ethernet
Cat 5e
Twisted-pair cable category that can support Gigabit Ethernet
Cat 6a
Twisted-pair cable category that can support Gigabit Ethernet
Cat 7
Twisted-pair cable category that can support Gigabit Ethernet
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Type of crosstalk that occurs between wire pairs near the source of a signal
Fiber type mismatch
Type of fiber-cable problem caused by pairing a 50-micron core cable with a 62.5-micron core cable
tcpdump
Utility also known as a packet sniffer
tracert
Utility that traces the path between networked nodes
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
VDI
Virtual Desktop Infrastructure used to offer a consistent desktop experience to remote users
RTT
common method to measure data network latency
encoding
converting data into a digital signal for transmission
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
250 watts
throughput received at the moment with a total signal strength of 1000 watts and 6 dB loss