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Comptia Network+
Network+ Study Cards
266
Computer Networking
Professional
03/15/2009

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Term
802.12
Definition
IEEE 100 mbps technologies
Term
IEEE 802.5
Definition
Token Ring
Term
IEEE 802.3
Definition
CSMA/CD
Term
IEEE 802.2
Definition
LLC (Logical Link Control)
Term
802.3a
Definition
Thinnet
Term
802.3u
Definition
Fast Ethernet(100 mbps)
Term
802.3z
Definition
Gigabit Ethernet (1000mbps)
Term
802.1
Definition
IEEE Internetworking
Term
802.4
Definition
IEEE Token Bus
Term
IRQ for COM 1
Definition
4
Term
IRQ for COM 4
Definition
3
Term
IRQ for COM 3
Definition
4
Term
IRQ for COM 2
Definition
3
Term
How many bits in a byte?
Definition
8
Term
FQDN
Definition
Fully qualified domain name (eg host.domain.tld )
Term
EMI
Definition
Electromagnetic Interference
Term
CSMA/CA
Definition
Carrier Sense Multiple Access / Collision *Avoidance*
Term
CSMA/CD
Definition
Carrier Sense Multiple Access / Collision *Detection*
Term
NAS
Definition
Network Attached Storage - hardrive/storage directly connected to network and accessible though an IP address
Term
First 3 bytes of a MAC address is what?
Definition
OUI - Organizationally Unique Identifier set by IEEE
Term
Last 3 bytes of a MAC address are what?
Definition
Device ID
Term
Length of a MAC address
Definition
48 bits = 6 bytes = 12 hex digits
Term
Length of an IP address
Definition
32 bits = 4 bytes = 4 octets
Term
/24 Private IP range
Definition
10.0.0.0 - 10.255.255.255
Term
/16 Private IP Range
Definition
192.168.0.0 - 192.168.255.255
Term
/12 Private IP Range
Definition
172.16.0.0 - 172.31.255.255
Term
APIPA range
Definition
169.254.0.0 - 169.255.255.255
Term
3 items that must be configured for internet connectivity
Definition
unique IP address, Subnet Mask, Default Gateway
Term
NBP
Definition
Name Binding Protocol - AppleTalk name resolution service
Term
AppleTalk media access method
Definition
CSMA/CA
Term
What command do you use to find computers with duplicate IPs?
Definition
arp -a which displays a listing of the arp table
Term
What command do you use to add a static entry to the ARP table
Definition
arp -s
Term
arp -a
Definition
List IP addresses that have been resolved to MAC addresses, ie view arp cache
Term
Netstat -a
Definition
Lists all open connections and listening ports
Term
Utility that shows the route a packet takes to reach a destination, and how much delay is happening at each hop
Definition
Traceroute (tracert on Windows)
Term
Command used icmp echo request to determine if a node is up
Definition
ping
Term
Command used for information on open connections
Definition
netstat
Term
Command used for information regarding netbios over tcp/ip
Definition
nbtstat
Term
Command to show IP address, subnet mask, and default gateway on windows
Definition
ipconfig
Term
Command to show MAC address on windows
Definition
ipconfig /all
Term
Command to show and change IP configuration on UNIX
Definition
ifconfig
Term
Command to change IP configuration on windows
Definition
netsh
Term
Command that sends a message to a remote host and times the responses back
Definition
Ping
Term
Command to determine if a host is up or reachable
Definition
Ping
Term
Command to determine where a bottleneck or network fault is occurring
Definition
traceroute (tracert on Windows)
Term
small form factor fiber-optic connectors
Definition
MT-RJ, LC
Term
1000Base-CX connector
Definition
HSSDC (9-pin, copper based High Speed Serial Data)
Term
fiber connector with 2 fibers
Definition
MT-RJ
Term
# of pins for an RJ-45 connector
Definition
8
Term
Two co-axial cable connectors:
Definition
F-Type and BNC
Term
Round fiber optic connector
Definition
ST
Term
Square fiber connector
Definition
SC
Term
Common firewall software features
Definition
Packet filtering, proxy, NAT
Term
Max Distance for 1000BaseLX - singlemode
Definition
5km
Term
Max Distance for 1000BaseLX - multimode
Definition
275m
Term
Max Distance for 1000BaseSX - 62.5 micron
Definition
220-275m
Term
Max Distance for 1000BaseSX - 50 micron fiber
Definition
500-550m
Term
Max Distance for 100BaseFx
Definition
2km
Term
Max length of 10BaseF
Definition
2k meters
Term
IrDA 1.1 max distance
Definition
1 meter (3 feet)
Term
max speed of FDDI
Definition
100 mbps
Term
max speed of token ring
Definition
16mbps (current), 4 mbps (legacy)
Term
Bluetooth 1.1 max speed
Definition
1mbps theoretical, 723kbps practical
Term
Bluetooth 2.0 max speed
Definition
2.1 Mbps
Term
IrDA 1.1 max speed
Definition
4 Mbps
Term
T1 Max Speed
Definition
1.544 Mbps
Term
E1 Max Speed
Definition
2.048 Mbps
Term
CAT 5 Max Speed
Definition
100 mbps
Term
CAT 3 Max Speed
Definition
10 mbps
Term
Cat 5e
Definition
1000 mbps = 1 Gigabit per second
Term
Cat 6
Definition
1000 mbps+ = 1 Gigabit per second
Term
Minimum category cable for gigabit ethernet (1000Base-TX)
Definition
Cat5e
Term
Min category rating for 10BaseT network?
Definition
Cat 3
Term
Media most resistant to EMI
Definition
Fiber
Term
Netware >= 3.12 Frame Type
Definition
802.2
Term
Netware <= 3.11 Frame Type
Definition
802.3
Term
GSNW
Definition
Gateway Services for Netware - allows windows clients to access netware servers through a Windows server
Term
CSNW
Definition
Client Services for Netware allows windows workstations to access netware resources without going through a windows server gateway
Term
FPNW
Definition
File and Print Services for Netware allows Novel clients to access files and printers on a Windows server
Term
NDS
Definition
Novell Directory Services - IPX/SPX name resolution service
Term
Default Netware 4 account
Definition
Admin (not Administrator like windows)
Term
Layer 1
Definition
Physical -hub/repeater -MAU/MSAU -NIC
Term
Layer 2
Definition
Data-link/MAC -Bridges, switches -physical addressing
Term
Layer 3
Definition
Network -routers -logical addressing --IPX, IP, NetBEUI
Term
Layer 4
Definition
Transport -TCP, SPX -Connection-oriented
Term
Layer 5
Definition
Session
Term
Layer 6
Definition
Presentation
Term
Layer 7
Definition
Application
Term
Layer for signal encoding?
Definition
Physical
Term
Layer for data delivery across an individual link
Definition
data link / layer 2
Term
Layer for router
Definition
Network Layer / Layer 3
Term
Layer for network addressing
Definition
Network Layer / Layer 3
Term
Layer for compression
Definition
Presentation Layer
Term
Layer for error recover and flow control
Definition
Transport Layer
Term
Layer for creating sessions
Definition
Session layer
Term
Switch operates at what layer?
Definition
Layer 2
Term
Router operates at what layer?
Definition
Layer 3
Term
WAP operates at what layer?
Definition
Layer 2
Term
Bridge operates at what layer?
Definition
Layer 2
Term
Hubs operate at what layer?
Definition
Layer 1
Term
What device operates at upper 3 layers?
Definition
Gateway
Term
IPSec operating layer
Definition
Layer 3
Term
L2TP operating layer
Definition
Layer 2 (Transport Protocol)
Term
SSL operating layer?
Definition
Session Layer
Term
Port 22
Definition
SSH
Term
Port 20
Definition
FTP - Data
Term
Port 21
Definition
FTP - Control
Term
Port 443
Definition
HTTPS/SSL
Term
Port 15
Definition
Netstat
Term
Port 23
Definition
Telnet
Term
Port 25
Definition
SMTP
Term
Port 53
Definition
DNS
Term
Port 69
Definition
TFTP
Term
Port 80
Definition
HTTP
Term
Port 110
Definition
POP3
Term
Port 119
Definition
NNTP
Term
Port 123
Definition
NTP
Term
Port 137
Definition
Netbios
Term
Port 220
Definition
IMAP
Term
ICMP
Definition
Internet Control Message Protocol - IP traffic cop, (eg. Ping command)
Term
1000 bits = _________ kb
Definition
1000 bits is a kilobit
Term
1000 kilobits = ___________ mb
Definition
1000 kb is a megabit
Term
1000 megabits = __________ gb
Definition
1000 mb is a gigabit
Term
1000 gigabits = ___________ tb
Definition
1000 gigabits is a terrabit
Term
1 gigabit = _________ bits
Definition
1 gb is 1 billion bits
Term
1 megabit = ________ bits
Definition
1 mb is 1 million bits
Term
1 kilobit = _________ bits
Definition
1 kb is 1 thousand bits
Term
RARP
Definition
Reverse Address Resolution Protocol - Issues IP based on MAC, works like DHCP
Term
ARP
Definition
Address Resolution Protocol - IP to MAC translation protocol
Term
DNS
Definition
Domain Name Service - domain (internet) names to IP resolution protocol
Term
WINS
Definition
Window Internet Name Service - NetBios (Windows) names to IP translation service
Term
Where are DHCP lease options configured?
Definition
On the DHCP server
Term
At what percentage expiration of its DHCP lease will the client try to renew the lease?
Definition
87.50%
Term
Multicast control protocol
Definition
IGMP (Internet Group Management Protocol)
Term
Program to allow UNIX to host file shares for Windows
Definition
SaMBa (based on SMB)
Term
Protocol for PING?
Definition
ICMP
Term
Technology that allows hosts on a private network to communicate with the internet through a shared public IP address
Definition
NAT
Term
NAT
Definition
Network Address Translation
Term
SNMP
Definition
Simple Network Management Protocol - manage network equipment (traps, agents, MIBS, manager software)
Term
FTP
Definition
File Transfer Protocol - common protocol for copying/moving files over the internet
Term
HTTPS
Definition
HTTP Secure - HTTP protocol over SSL
Term
Telnet
Definition
Insecure protocol to use a command line interface (terminal emulation) on a remote machine (typically UNIX, but windows has telnet). Deprecated for SSH
Term
SMTP
Definition
Simple Message Transfer Protocol - outgoing mail, or transferring mail from server-to-server
Term
SSH
Definition
Secure Shell - secure replacement for Telnet, allows a command line interface to a remote computer (typically UNIX)
Term
TFTP
Definition
Trivial File Transfer Protocol - stripped down file transfer (Like FTP) protocol over UDP.
Term
HTTP
Definition
HyperText Transfer Protocol - accessing websites
Term
POP3
Definition
Post Office Protocol 3 - incoming email, not good for multiple/mobile devices
Term
NNTP
Definition
Network News Transfer Protocol - Network news (usenet), old, email like message board like system
Term
NTP
Definition
Network Time Protocol - sync a hosts time to a time server
Term
Netbios
Definition
Network Basic Input Output System - session layer protocol to facilitate lan communication. Originally developed by IBM, adopted by Microsoft for windows networking pre native TCP/IP. Usually refers to windows file and print sharing, specifically NetBIOS Names
Term
IMAP
Definition
Internet Message Access Protocol - incoming email, understands folders, good for multiple locations/mobile devices
Term
NetBEUI
Definition
Microsoft (designed by IBM) legacy, nonroutable network protocol
Term
SMB/CIFS
Definition
Server Message Block/ Common Internet File System - protocol for Windows file sharing
Term
PPP
Definition
Point to Point Protocol - Layer 2 encapsulation protocol for encapsulating layer 3 protocols over point-to-point links
Term
PPTP
Definition
Point to Point Tunneling Protocol - Encrypted VPNs using PPP
Term
WINS
Definition
Windows Internet Name Service - Like DNS but for Netbios only
Term
DHCP
Definition
Dynamic Host Control Protocol - dynamic IP addressing
Term
SFTP
Definition
Secure FTP- FTP through SSH
Term
SCP
Definition
Secure Copy - Copy files over SSH
Term
IPX
Definition
Novell Connectionless Protocol
Term
SPX
Definition
Novell Connection Oriented Protocol
Term
NFS
Definition
Network File System - Unix file sharing protocol
Term
Minimum # Drives for RAID 10
Definition
4 - Two striped disks, mirrored on two more
Term
# of simultaneous drive failures RAID 5 can recover from
Definition
1
Term
# of simultaneous drive failures RAID 6 can recover from
Definition
2
Term
RAID feature that increases performance
Definition
Striping
Term
RAID features that increase fault tolerance
Definition
Mirroring or Parity
Term
RAID level that mirrors striped drives
Definition
RAID 10 (1+0)
Term
RAID Level that provides NO fault tolerance
Definition
Raid 0 - Striping
Term
RAID Level that provides at least one duplicate copy of all data
Definition
Raid 1 - Mirroring
Term
Mirrored Drives with independent disk controllers
Definition
Raid 1 - Duplexing
Term
Min 3 disks, striping with parity on one parity disk
Definition
RAID 3
Term
Min 3 disks, striping with parity across all disks
Definition
RAID 5
Term
fox and hound
Definition
Tone generator and locator
Term
Tool to connect a wire to a wiring block
Definition
Punchdown Tool
Term
Tool used to diagnose breaks in fiber optic cabling
Definition
OTDR - Optical Time Domain Reflectometer
Term
Tool used to diagnose breaks or other problems in UTP cabling
Definition
TDR - Time Domain Reflectometer
Term
Necessary for effective Antivirus
Definition
Update virus signatures
Term
Type of virus that can change itself to avoid detection
Definition
Polymorphic
Term
Type of virus that can hide itself from detection
Definition
Stealth
Term
B Channel of BRI ISDN
Definition
64 kbps
Term
D Channel of BRI ISDN
Definition
16 kbps
Term
# of simultaneous connections to Windows 2000/XP Pro Share
Definition
10
Term
Netbios Name
Definition
Up to 16 byte (15 characters + 1 byte suffix) Windows name.
Term
Netbios Name Suffix
Definition
00 - Workstation , 20 - Server
Term
802.11a max speed
Definition
54 mbps
Term
802.11g max speed
Definition
54 mbps
Term
802.11 max speed
Definition
2 mbps
Term
# of non-overlapping 802.11b channels
Definition
Three: 1,6, & 11
Term
# of non-overlapping channels on 802.11a
Definition
8
Term
802.11b frequency
Definition
2.4ghz
Term
802.11a frequency
Definition
5.0ghz
Term
802.11g frequency
Definition
2.4ghz
Term
Bluetooth frequency
Definition
2.4ghz
Term
802.11a signaling method
Definition
orthogonal frequency-division multiplexing (OFDM)
Term
802.11b signaling method
Definition
DSSS (Direct-sequence spread spectrum)
Term
802.11g signaling method
Definition
orthogonal frequency-division multiplexing (OFDM) ???
Term
802.11 frequency
Definition
2.4ghz
Term
Sources of EMI
Definition
Fluorescent lights, AC power lines, motors, heavy equipment, etc
Term
UDP
Definition
User Datagram Protocol - Layer 4, connectionless, best effort transfer protocol
Term
TCP
Definition
Transport Control Protocol - Layer 4, connection-oriented, guaranteed delivery protocol
Term
Passwords should be changed
Definition
Not too often, not too seldom ~1 month
Term
The most secure passwords are _______
Definition
Complex and longer than 8 characters - upper+lower alpha+ numeral + symbol like P@s$220rD*
Term
Proxy
Definition
Server that does something on behalf of an application (web proxy, internet proxy)
Term
SSID
Definition
Simply names a Wireless Access Point (WAP) for convenience. No other functionality
Term
Example of directional antenna
Definition
Yagi Antenna
Term
Type of antenna that sends a signal in all directions
Definition
Omnidirectional
Term
Type of antenna that sends a signal in two directions
Definition
Bidirectional
Term
Type of antenna that sends a signal in one direction
Definition
Directional
Term
Measure of the directionality of a wireless signal
Definition
beamwidth
Term
Antennas that increase maximum range, but decrease the beamwidth
Definition
Directional
Term
Higher gain antennas increase maximum range but decrease:
Definition
Beamwidth
Term
Major sources of wireless interference
Definition
Microwave ovens, metal(cranes), water(trees)
Term
-
Definition
Star
Term
-
Definition
Ring
Term
-
Definition
Bus
Term
-
Definition
Mesh
Term
Star Advantages
Definition
Cheapest, easiest to install and upgrade. Easier to troubleshoot than bus. Break in one segment only affects that segment
Term
Star Disadvantages
Definition
Uses more cable than Bus. Single-point of failure is the central connectivity device (hub, switch, mau)
Term
Bus Advantages
Definition
Uses least amount of cabling
Term
Bus Disadvantages
Definition
One fault in the bus (cable) brings the entire network down, hard to troubleshoot
Term
Mesh Advantages
Definition
Highly fault tolerant
Term
Mesh Disadvantages
Definition
Very expensive, difficult to expand
Term
Token Ring connectivity device
Definition
MAU/MSAU
Term
Ethernet Connectivity device
Definition
Hub/Switch
Term
Layer 1 Devices
Definition
Cabling, hubs, repeaters
Term
Layer 2 Devices
Definition
Switches, bridges, MAUs
Term
Layer 3 Devices
Definition
Routers / Brouters / Layer-3 Switch
Term
10base2
Definition
Thinnet, 10mbps, 185meter max, coax, bus topology
Term
10base5
Definition
Thicknet, 100mbps, 500meter max, coax, bus topology
Term
10baseT
Definition
Ethernet, 10mbps, twisted pair, star topology
Term
10baseF
Definition
Ethernet, 10mbps, multimode fiber, 2km
Term
100BaseT
Definition
Fast Ethernet, 100mbps over twisted pair
Term
100BaseTX
Definition
Fast Ethernet, 100mbps over twisted pair
Term
1000BaseCX
Definition
Gigabit Ethernet over balanced coper STP, 25meter max
Term
100Base4
Definition
Exception to the rule! Allows 100megabits over Cat 3
Term
Hot Site
Definition
Disaster recovery, Instant cutover, all systems and data duplicated
Term
Cold Site
Definition
Disaster recovery, Site exists but no equipment or data is in place, slow cutover
Term
Warm Site
Definition
Disaster recovery, quick, but not Instant cutover, all systems in place but must be restored from backup
Term
Incremental Backup
Definition
Backs up all files that have changed since the last full or incremental backup. Resets the archive bit
Term
Differential Backup
Definition
Backs up all files that have changed since the last full backup. Does not reset the archive bit
Term
Full Backup
Definition
Backs up all files. Resets the archive bit
Term
VLAN
Definition
Creates separate broadcast domains (lans) in a single switch using software
Term
Backups are not fault tolerance
Definition
Backups are part of disaster recovery
Term
Examples of fault tolerance
Definition
RAID 1,3,5,6,10 (but not 0), UPS, hot sites,
Term
ZIP
Definition
Appletalk Zone Information Protocol
Term
VPN
Definition
Virtual Private Network - uses encryption and tunneling to create a virtual private connection across the public internet
Term
32 bit number that defines which portion of an IP address is the network address vs the node address
Definition
Subnet Mask
Term
Text file used to help resolve host names into IP addresses
Definition
hosts
Term
Text file used to help resolve windows/netbios names into IP addresses
Definition
lmhosts
Term
ISDN
Definition
Integrated Services Digital Network - digital phone line based technology, predates DSL, expensive, voice and data over same line, BRI 2 B channels 64kbits/per, PRI is 23 B channels for 1.54mbps
Term
Novell’s legacy, native, routable network protocol
Definition
IPX/SPX
Term
Microsoft’s legacy, native, nonroutable network protocol
Definition
NetBEUI
Term
Defacto, routable network protocol developed for UNIX, which is the defacto language of the internet
Definition
TCP/IP
Term
SSL/TLS
Definition
Secure Sockets Layer/Transport Layer Security
Term
Layer 4 Protocols
Definition
TCP, UDP, SPX
Term
OUI
Definition
Organizationally Unique Identifier - first 3 bytes/24 bits of the MAC address
Term
SLIP
Definition
Serial Line Internet Protocol
Term
Datalink protocol that can only carry IP packets, has no error detection or encryption capabilities
Definition
SLIP
Term
PAP
Definition
Password Authentication Protocol - PPP auth protocol, has no encryption/is insecure and is not often used
Term
CHAP
Definition
Challenge Handshake Authentication Protocol - PPP authentication that uses a secure challenge/response protocol for authentication
Term
Hardware device used to connect dissimilar network technologies
Definition
Gateway (not a default gateway)
Term
Address of the default router for a node
Definition
Default Gateway
Term
Directory services on Netware 6.0+
Definition
eDirectory
Term
Directory services on Netware 4-5
Definition
NDS (Novell Directory Services)
Term
Directory services on Netware 3
Definition
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