Tag: network+

fiber-connector-types.png 497 KB
1. ST connectors: These connectors are the most common type of commercial fiber optic connector. These connectors utilize an exposed plastic tube housing the optical fiber.

2. SC-Connector: SC is short for Subscriber Connect is one of the most frequently used connectors. Used in fiber-optic networking, it has caps to prevent laser light reaching eyes.

3. FC connector: It is similar to ST connectors, these fiber optic connector's screws into their mating jacks. 

4. LC cables: latch and release into their jacks in a manner similar to Ethernet connectors. Smaller in form than SC connectors, their durability is not compromised, nor is cost increased. Instead of snapping or thermo forming the connector to the cable, it is glued. This makes it a popular connector for field use. 
Networking tools to troubleshoot issues.
7 - Application -> Application

6 - Presentation  -> Application

5 - Session  -> Application

4 - Transport -> Transport

3 - Network -> Network

2 - Data Link -> Network Interface

1 - Physical -> Network Interface

Mnemonic: All People Seem To Need Data Processing (OSI)

TCP/IP: Application - Transport - Network Interface

Straight through is the most common type and is used to connect computers to hubs or switches. They are most likely what you will find when you go to your local computer store and buy a patch cable. 

Crossover Ethernet cable is more commonly used to connect a computer to a computer and may be a little harder to find since they aren’t used nearly as much as straight through Ethernet cable.

10Base-2
  • 10Mbps over thin coaxial cable
  • maximum length is 185 meters

10Base-T
  • 10 Mbps 
  • category 3 unshielded twisted pair (UTP) wiring
  • up to 100 meters long

100Base-T
  • known as Fast Ethernet
  • category 5, 5E, or 6 UTP wiring
  • up to 100 meters long.

100Base-FX
  • a version of Fast Ethernet that uses multi-mode optical fiber
  • Up to 412 meters long

100BaseTF 
  • Ethernet over fiber

1000Base-T
  • Gigabit Ethernet
  • Category 5 UTP wiring
  • Up to 100 meters long.

1000Base-TX
  • Gigabit Ethernet 
  • Category 5 UTP wiring
  • Up to 100 meters long

10GBase-T
  • 10 Gbps connections over category 5e, 6, and 7 UTP cables

10Gbase-SR
  • Short Range fiber
  • 10 gigabit Ethernet over multi-mode fiber
  • up to 300 meters in length. Some of the older style of fiber may only go to 80 meters in length. T

10Gbase-ER
  • Extended Range fiber
  • 10 gigabit Ethernet over multi-mode fiber
  • max distance of 40 km

10Gbase-EW
  • similar to 10Gbase-ER
  • designed to connect to SONET equipment

First octet value range from X to X. Example for class B: Public IP Range: 128.0.0.0 - 191.255.0.0. 

  • A 1-126
  • B 128 - 191
  • C 192 - 223
  • D 224 - 239
  • E 240 - 254

802.11b
  • 11 MB/sec
  • 2.4 GHz
  • 11 overlapping channels which caused problems

802.11a
  • 54 MB/sec
  • 50 GHz

802.11g
  • 54 MB/sec 
  • 2.4 GHz

802.11n
  • 108-300 MB/sec - up to 600
  • 2.4/5 GHz 
  • MIMO

802.11ac
  • 1 GB/sec
  • 2.4/5 GHz 
  • more channels, more speed
  • MU-MIMO
  1. Identify Problem
  2. Establish Theory
  3. Test Theory
  4. Establish Plan
  5. Implement Solution
  6. Verify Functionality