Various standards listed...
802.2 - Logical link control
802.3 - Ethernet (CSMA/CD)
802.3ab - 1000Base-T
802.3ae - 10 Gigabit ethernet
802.3u - 100Base-TX, 100Base-T4, 100Base-FX
802.3z - 1000BaseZX, Single Mode Fiber
802.5 - Token ring
802.7 - Broadband
802.8 - Fiber optic
802.11 - Wireless LAN
802.11e - QoS
802.11i - WPA2
802.15 - Wireless PAN
802.15.1 - Bluetooth
802.16 - Wireless MAN (WiMax)
802.20 - Mobile Broadband Wireless
Bandwidth:
56K
modem 0.056Mbps
ISDN
0.128Mbps
Frame
Relay
0.056 to 1.544Mbps
T1
1.544Mbps
T3
44.736Mbps
STS-1
(OC-1)
51.840Mbps
STS-3
(OC-3)
155.251Mbps
STS-48
(OC-48)
2.488320Gbps
802.11 (2.4Ghz)
1-2Mbps
802.11a (5Ghz)
54Mbps
(Real world throughput 20+Mbps)
802.11b (2.4Ghz)
1, 2, 5.5, 11Mbps (Real world throughput 5+Mbps)
802.11g
(2.4Ghz)
54Mbps (Real
world throughput 20+Mbps)
802.15.1 (2.4Ghz?)
1Mbps
ISDN:
A Channel = 16Kbps
2 B Channels = 64Kbps each
Wireless:
802.11 2.4Ghz ISM Channels
1 = 2.412Ghz
2 = 2.417Ghz
3 = 2.422Ghz
4 = 2.427Ghz
5 = 2.432Ghz
6 = 2.437Ghz
7 = 2.442Ghz
8 = 2.447Ghz
9 = 2.452Ghz
10 = 2.457Ghz
11 = 2.462Ghz
12 = 2.467Ghz
13 = 2.472Ghz
14 = 2.484Ghz
1-11 = North America
1-13 = Europe
1-14 = Asia
You should only use channels 1, 6, and 11. Sometimes you can get away with 1, 4, 7, 11 or something similar to that.
MAC addresses:
A MAC address is usually written like so
XX-XX-XX-XX-XX-XX
or
XX:XX:XX:XX:XX:XX
There are 281 trillion MAC address possibilities.
A MAC address is a 48-bit number or
12 hex digits (6 pairs of hex digits).
The first 3 pairs represent the OUI.
MAC Broadcast Address:
FF-FF-FF-FF-FF-FF
IP addressing:
An IP address is a 32-bit number (4 bytes).
The 4 octets are represented as decimal numbers 0-255.
An IP address is written like so
xxx.xxx.xxx.xxx
Classes (verified):
Class A: 0-127 (first byte = 0xxxxxxx)
Possible networks: 126
Possible hosts: 16,777,214 (2 ^ 24) - 2)
Default Subnet Mask: 255.0.0.0 or /8
Class B: 128-191 (first byte = 10xxxxxx)
Possible networks: 16,384
Possible hosts: 65,534 (2 ^ 16) - 2)
Default Subnet Mask: 255.255.0.0 or /16
Class C: 192-223 (first byte = 110xxxxx)
Possible networks: 2,097,152
Possible hosts: 254
(2 ^ 8) - 2)
Default Subnet Mask: 255.255.255.0 or /24
Class D: 224-239 (first byte = 1110xxxx) (multicast)
Class E: 240-255 (first byte = 11110xxx)
Private Addresses:
10.x.x.x
192.168.x.x
Subnetting:
Increment - 2 = number of hosts on each subnet (64 - 2 = 62, network and broadcast IDs)
2 ^ extra bits = number of usable subnets (2 ^ 2 = 4, so 4 usable subnets = 0, 64, 128, 192)
if zero subnet rule then... (2 ^ extra bits) - 2 = usable subnets .... can't use first and last subnets
TCP Header:
Source Port, Destination Port, Sequence Number, Acknowledgement Number
Misc. Flags, Window Size, Checksum, Urgent, Options
UDP Header:
Source Port, Destination Port, Length, Checksum
OSI Model:
Physical - Layer 1 (hubs), converson to electrical signals - bits
Data Link - Layer 2 (switches), conversion to packets, MAC addresses (HDLC, PPP, CDP, Frame Relay, Ethernet) -frames
Network - Layer 3 (routers), IP routing (IPX, ICMP, OSPF, IGRP/EIGRP, RIP, ARP/RARP) - packets
Transport - insurance of data transmission, error correction, sequence numbering, TCP/UDP moreso TCP - segments
Session - initiation/termination of connection
Presentation - Data formats
Application - HTTP, FTP, SMTP, POP3, NTP, SNMP, TFTP, DNS, DHCP, Telnet
TCP/IP Model:
Application (layers 5, 6, 7)
Transport (layer 4)
Internet (layer 3)
Network Interface (layers 1, 2)
(Mnemonic: Please Do Not Throw Sausage Pizza Away)