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Network+
Memorization Guide
147
Computer Networking
Undergraduate 1
11/30/2007

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Term
FDDI (Fiber Distributed
Data Interface)
Definition
200 Mbps Token Passing Physical Star/
Logical Ring
Fiber-optic or UTP
implemented as
CDDI
Term
IEEE 802.3 (Ethernet)
Definition
10 Mbps, 100 Mbps,
1000 Mbps and 10
Gbps
CSMA/CD
Physical Bus
Logical Bus and
Physical Star
Logical Bus
Coax or UTP
Term
IEEE 802.5 (Token Ring)
Definition
4 or 16 Mbps Token Passing Physical Star/
Logical ring STP
Term
IEEE 802.11 (Wireless)
Definition
1, 2, 4, 10, 11 and 54
Mbps CSMA/CA No Topology None (Wireless)
Term
10BASE2
Definition
RG-58 cable with BNC “T” connectors 185 meters 10 Mbps
Term
10BASE5
Definition
RG-8 cables with Vampire tap transceivers 500 meters 10 Mbps
Term
10BASE-T
Definition
At least UTP Category 3 cable with RJ-45 connectors 100 meters 10 Mbps
Term
10BASE-FL
Definition
Multimode fiber optic cable with ST or SC connectors
10 Mbps
2000 meters
Term
100BASE-T4
Definition
At least UTP Category 3 cable with RJ-45 connectors
Uses all four pairs of wires 100 meters 100 Mbps
Term
100BASE-TX
Definition
At least UTP Category 5 cable with RJ-45 connectors 100 meters 100 Mbps
Term
100BASE-FX
Definition
Multimode fiber optic cable with ST or SC connectors
100 Mbps
400 meters
Term
1000BASE-CX
Definition
Twinaxial shielded cable with DB-9 or HSSDC
connectors 25 meters 1000 Mbps
Term
1000BASE-LX
Definition
SMF cable with SC and ST connectors 5 kilometers 1000 Mbps
Term
1000BASE-SX
Definition
MMF cable with SC and ST connectors
*550 meters *max
length varies by
implementation 1000 Mbps
Term
1000BASE-T
Definition
At least Category 5e UTP cable with RJ-45 connectors
1000 Mbps
100 meters
Term
10GBASE-ER
Definition
SMF cable with various connectors 40 kilometers 10 Gbps
Term
10GBASE-LR
Definition
SMF cable with various connectors 10 kilometers 10 Gbps
Term
10GBASE-SR
Definition
MMF with various connectors
10 Gbps
300 meters
Term
802.1
Definition
LAN/MAN Bridging Management
Term
802.2
Definition
Logical Link Control (LLC)
Term
802.3
Definition
Carrier Sense Multiple Access/Collision Detection (CSMA/CD) - Ethernet
Term
802.4
Definition
Token Passing Bus (Withdrawn)
Term
802.5
Definition
Token Ring
Term
802.6
Definition
Distributed Queue Dual Bus (DQDB) – Metropolitan Area Network
(Withdrawn)
Term
802.7
Definition
Broadband LAN (Withdrawn)
Term
802.8
Definition
Fiber Optic
Term
802.9
Definition
Isochronous LANs (Withdrawn)
Term
802.10
Definition
Interoperable LAN/MAN Security (Withdrawn)
Term
802.11
Definition
Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) Wireless
LAN
Term
802.12
Definition
Demand-priority
Term
802.14
Definition
Cable Modems (Withdrawn)
Term
802.15
Definition
Wireless Personal Area Network (WPAN)
Term
802.16
Definition
Broadband Wireless Metropolitan Area Network (WMAN)
Term
802.17
Definition
Resilient Packet Ring Access (RPA)
Term
802.20
Definition
Mobile Broadband Wireless Access
Term
Which type of cable is used to connect these two devices? Computer to Computer
Definition
Crossover
Term
Which type of cable is used to connect these two devices? Computer to Hub/Switch
Definition
Standard Patch
Term
Which type of cable is used to connect these two devices? Hub/Switch without crossover port to Hub/Switch without crossover port
Definition
Crossover cable plugged into
standard port
Term
Which type of cable is used to connect these two devices? Hub/Switch with crossover port to Hub/Switch with crossover port
Definition
Standard Patch cable. One end
plugged into a standard port. The
pother end plugged into the
crossover port
Term
Category 1 Cable
Definition
<4ft <1Mbps POTS and ISDN connections
Term
Category 2 Cable
Definition
100 Meters 4 Mbps IBM Cabling System for token ring networks
Term
Category 3 Cable
Definition
100 Meters 16 Mbps Voice and data on 10BASE-T Ethernet networks
Term
Category 4 Cable
Definition
100 Meters 20 Mbps Used in 16 Mbps token Ring networks
Term
Category 5 Cable
Definition
100 Meters 100 Mbps 100BASE-T Ethernet Networks
Term
Category 5e Cable
Definition
100 Meters 1000 Mbps 100BASE-T and 1000BASE-T Ethernet networks
Term
Category 6 Cable
Definition
~100 Meters ~10 Gbps 100BASE-T and 1000BASE-T Ethernet networks and other implementations to be determined
Term
Fiber Optic 10BASE-FL
Definition
850nm
Term
Fiber Optic 100BASE-FX
Definition
1300nm
Term
Fiber Optic 1000BASE-SX
Definition
850nm
Term
Fiber Optic 1000BASE-LX
Definition
1300nm
Term
Fiber Optic 10GBASE-SR
Definition
850nm
Term
Fiber Optic 10GBASE-LR
Definition
1300nm
Term
Fiber Optic 10GBASE-ER
Definition
1550nm
Term
IPX/SPX
Definition
Routable
Addressing:20 Digit Hexadecimal
Very Interoperable
Naming Convention:Generally, only items with names are servers
Term
NetBEUI
Definition
Not
Routable
Addressing:Unique Name
Not very Interoperable
Naming Convetion:Unique Name
Term
AppleTalk
(Version 2)
Definition
Routable
Addressing:24 bit address
Requires additional software for interoperability
Naming Convention:Name Binding Protocol
(NBP)
Term
TCP/IP
Definition
Routable
Addressing:Dotted Decimal
Most Interoperable
Naming convetion:FQDN or NetBIOS
Term
OSI Layer 7 Application
Definition
HARDWARE:Gateway and Proxy server
PROTOCOLS:DNS, FINGER, FTP, HTTP, MIME, NFS, NNTP, POP3, SMB, SMTP, SNMP, Telnet and TFTP
FUNCTIONS:
1. Take data from application
2. Ensure all necessary resources are available
3. Initialize services and the network for data transmission
Term
OSI Layer 6 Presentation
Definition
HARDWARE:Gateway
PROTOCOLS:ASCII, DIC, EBC, GIF, JPEG, PICT, and TIFF
FUNCTIONS:
1. Reformat or translate between different character sets...
2. encrypting, decrypting and compression, decompression
3. Provides support for error recovery
Term
OSI Layer 5 Session
Definition
HARDWARE:Gateway
PROTOCOLS:NetBIOS, SAP, RPC, SQL, X-Windows
FUNCTIONS:
1. Assumes a reliable virtual connection
2. Establishing, maintaining, synchronizing and terminating connections
3. Port numbers are assigned and maintained
Term
OSI Layer 4 Transport
Definition
HARDWARE:Gateway
PROTOCOLS:Apple Talk Protocol(ATP), Name Binding Protocol(NBP), NetBEUI, Point to Point Tunneling Protocol(PPTP), Sequenced Packet Exchange(SPX), TCP, and UDP
FUNCTIONS:
1. Packages data into segments
2. Provides flow control
3. Performs end-to-end transport of data
Term
OSI Layer 3 Network
Definition
HARDWARE:Gateway, Router, Brouter
PROTOCOLS:ARP,ICMP,IP,IPSec,IPX,NetBIOS/NetBEUI,OSPF,and RIP
FUNCTIONS:
1. Break segmented data into packets and sequences them
2. Assign logical addresses to packets
3. Routes packets
Term
OSI Layer 2 Data Link
Definition
HARDWARE:Gateway, Switch, Bridge, Wireless Access Points(WAP), NIC
PROTOCOLS:802.1q,802.3(Ethernet),802.11a/b/g(Wireless),ATM,Frame relay,L2TP,PPP,PPTP,SLIP, and Token ring
FUNCTIONS:
1. Break data packet into frames
2. Manages Hardware addresses (MAC)
3. Defines the topology of the network based on the IEEE 802.x standards
4. Provide error and flow control
Term
OSI Layer 1 Physical
Definition
HARDWARE:Gateway, Repeater, Hub, NIC, cables
FUNCTIONS:
1. Physically, mechanically, and/or electronically connect network devices
2. Break frames into raw binary bits
3. Defines the network media used
Term
Wireless 802.11
Definition
2 Mbps 150 feet 2.4 GHz
Term
HomeRF
Definition
10 Mbps 150 feet 2.4 GHz
Term
802.11a
Definition
54 Mbps 150 feet 5.0 GHz
Term
802.11b
Definition
11 Mbps 300 feet 2.4 GHz
Term
802.11g
Definition
54 Mbps 300 feet 2.4 GHz
Term
Infrared (IrDA)
Definition
4 Mbps ~3 feet N/A
Term
Bluetooth
Definition
1 Mbps 33 feet 2.4 GHz
Term
ARP
Definition
Address Resolution Protocol
Term
BootP
Definition
Boot Protocol
Term
DNS
Definition
Dynamic Name System/Service
PORT NUMBER:53
Term
FTP
Definition
File Transfer Protocol
PORT NUMBERS:20/21
Term
HTTP
Definition
Hypertext Transfer Protocol
PORT NUMBER:80
Term
HTTPS
Definition
Secure Hypertext Transfer Protocol
PORT NUMBER:443
Term
ICMP
Definition
Internet Control Message Protocol
Term
IGMP
Definition
Internet Group Multicast Protocol
Term
IMAP4
Definition
Internet Messaging Access Protocol version 4
PORT NUMBER:143
Term
IP
Definition
Internet Protocol
Term
IPSec
Definition
Internet Security
Term
L2TP
Definition
Layer 2 Tunneling Protocol
Term
LDAP
Definition
Lightweight Database Access Protocol
Term
LPR
Definition
Line Printer Remote
Term
NNTP
Definition
Network news Transfer Protocol
PORT NUMBER:119
Term
NTP
Definition
Network Time Protocol
PORT NUMBER:123
Term
POP3
Definition
Post Office Protocol version 3
PORT NUMBER:110
Term
PPP
Definition
Point to Point Protocol
Term
PPTP
Definition
Point to Point Tunneling Protocol
Term
RARP
Definition
Reverse Address Resolution Protocol
Term
SCP
Definition
Secure Copy Protocol
Term
SFTP
Definition
Simple File Transfer Protocol
Term
SMTP
Definition
Simple Mail Transfer Protocol
PORT NUMBER:25
Term
SNMP
Definition
Simple Network Management Protocol
PORT NUMBER:161
Term
SSH
Definition
Secure Shell
PORT NUMBER:22
Term
SSL
Definition
Secure Sockets Layer
Term
TCP
Definition
Transmission Control Protocol
Term
TFTP
Definition
Trivial File Transfer Protocol
PORT NUMBER:69
Term
Telnet
Definition
PORT NUMBER:23
Term
Port Number:20/21
Definition
FTP(Data)/(Control)
Term
Port Number:22
Definition
SSH
Term
Port Number:23
Definition
Telnet
Term
Port Number:25
Definition
SMTP
Term
Port Number:69
Definition
TFTP
Term
Port Number:53
Definition
DNS
Term
Port Number:80
Definition
HTTP
Term
Port Number:110
Definition
POP3
Term
Port Number:119
Definition
NNTP
Term
Port Number:123
Definition
NTP
Term
Port Number:143
Definition
IMAP4
Term
Port Number:161
Definition
SNMP
Term
Port Number:443
Definition
HTTPS
Term
IP Class A
Definition
1.x.x.x to 126.x.x.x
# hosts/network:16777214
Default Subnet Mask:255.0.0.0
Reserved Private IP Address Range:
10.0.0.1-10.255.255.254 or 10.0.0.0/8
Term
IP Class B
Definition
128.x.x.x to 191.x.x.x
# hosts/network:65534
Default Subnet Mask:255.255.0.0
Reserved Private IP Address Range:
172.16.0.1-172.31.255.254 or 172.16.0.0/12
Term
IP Class C
Definition
192.x.x.x to 223.x.x.x
# hosts/network:254
Default Subnet Mask:255.255.255.0
Reserved Private IP Address Range:
192.168.0.1-192.168.255.254 or 192.168.0.0/16
Term
ARP – Used to map MAC addresses to IP address
Definition
Switches Description
-a Displays current ARP entries
-d Deletes specified entry in ARP table
-g Same as –a switch
-s Adds static entry in ARP table
Term
IPCONFIG – Used to display machines current network configuration. Used on Windows 9X, NT, 2000, and XP.
Definition
Switches Description
/? Displays all available switches
/all Displays all TCP/IP configuration information
/Release Releases all TCP/IP info received from DHCP
/Renew Releases then renews all TCP/IP info received from DHCP
Term
NBTSTAT – Displays protocol statistics and current TCP/IP connections using NBT (NetBIOS over TCP/IP).
Definition
Switches Description
-a [host] Displays a remote machines NetBIOS name table
-A [ip] Displays remote machines NetBIOS name table
-c Displays local name cache
-n Displays local name table
-r Displays how many NetBIOS names have been resolved to IP
-R Purges NetBIOS name table and reloads LMHOSTS file
-S Displays all NetBIOS sessions
-s Same as –S, except it tries to resolve IP address into hostname
Term
NETSTAT – Displays protocol statistics and current TCP/IP network connections including open ports on the computer.
Definition
Switches Description
-a Displays all TCP and UDP connections
-e Displays all packets sent out a NIC
-r Displays current routing table
-s Displays TCP, UDP, IP, and ICMP statistics
-n Switch modifier (uses names instead of network addresses)
-p Switch modifier (Specifies which protocol statistics to show)
Term
NSLOOKUP – used to query a name server to find out which name resolves to which IP address.
Definition
Switches Description
Type=mx Returns the responsible mail server for that domain
Domain= Sets current domain name to
Retry=x Specifies the number of retries (specified by x)
Term
PING – used to verify connectivity with a specific IP address.
Definition
Switches Description
-? Displays a list of available switches
-a Resolves the pinged address to host name
-n# Pings specified host a number of times (specified by the # sign)
-t Pings host continuously until you press Ctrl-C
Term
TRACERT
Definition
used to trace a packet from your computer to an Internet host, showing how many hops the packet requires
to reach the host and how long each hop takes.
Term
WINIPCFG
Definition
Used to display machines current network configuration. Used on Windows 95, Windows 98 and Windows
Millennium computers.
Term
UART Chip 8250
Definition
9,600 bps
Term
UART Chip 16450
Definition
38,400 bps
Term
UART Chip 16550
Definition
115,200 bps
Term
T1 Leased Line
Definition
1.544 Mbps
Term
E1 Leased Line
Definition
2.048 Mbps
Term
J1 Leased Line
Definition
2.048 Mbps
Term
T3 Leased Line
Definition
44.736 Mbps
Term
E3 Leased Line
Definition
34.368 Mbps
Term
J3 Leased Line
Definition
32.1 Mbps
Term
ISDN BRI
Definition
Uses 2 64 Kbps Bearer (B) Channels and 1 16 Kbps Delta (D) Channel.
Maximum 128 Kbps data rate.
Term
ISDN PRI
Definition
Uses 23 64 Kbps Bearer (B) Channels and 1 64 Kbps Delta (D) Channel.
Maximum 1.472 Mbps data rate.
Term
RAID 0
Spanning/Striping
Definition
Spreading Data across multiple disks
Data written to first disk until full, then successive disks
No increased performance
No fault tolerance
Term
RAID-0
Striping
Definition
Spreading data across multiple disks
Disks are logically seen as one large disk
Provides fast read/write performance
No fault tolerance
Term
RAID-1
Mirroring
Definition
Use two disks to make an exact duplicate of data on both disks
Use when data needs to be accessible 24X7
If one disk should fail the other disk will still function and will have an exact copy of the data
Term
RAID-1 Duplexing
Definition
Same as mirroring except each disk uses a separate disk controller for added redundancy
Term
RAID-5
Disk Striping with Parity
Definition
Spreading data across at least three disks
Data is written to the disk and parity information about the data is written to another disk
If one disk should stop working, all data restored from the parity information saved on the other disks
Term
Type of Backup:Copy
Definition
Backs up every selected file, regardless of the archive attribute setting
Clear Archive bit:No
Term
Type of Backup:Daily
Definition
Backs up every selected file that has changed that day, regardless of
the archive attribute setting
Clear Archive bit:No
Term
Type of Backup:Differential
Definition
Backs up only those files created or changed since the last normal or
incremental backup (Those files with the archive bit on). This method is
also used in combination with a periodic full backup. For example, a
Normal/Full backup on Mondays and a differential backup on the
remaining days of the week. Backs up more data per day but
restoration time is quicker. In case of a restore, you will only need to
restore the last normal backup and the last differential backup
Clear Archive bit:No
Term
Type of Backup:Normal/Full
Definition
Backs up every selected file, regardless of the archive attribute setting
Clear Archive bit:Yes
Term
Type of Backup:Incremental
Definition
Backs up only those files created or changed since the last normal/full
or incremental backup. (Those files with the archive bit on) You use
this method in combination with a normal/full backup. For example, a
normal/full backup on Mondays and an incremental backup on the
remaining days of the week. Backs up less data per day so backup
times are quicker. However, restoration times are generally longer
because you will need to restore the last normal/full backup as well as
all incremental backups since the last normal backup
Clear Archive bit:Yes
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