Week 1: Layer 1 Fundamentals (Cabling & Interfaces) Flashcards
Multimode vs. Single mode fiber
MM Fiber: a type of optical fiber used for communication over short distances; less expensive; used for shorter distances (300m); orange in color; 50 micron & 62.5 micron core
SM Fiber: more expensive; 8-10 micron glass core; yellow in color; provides 50 times more distance (15,000m)
Purpose of mode conditioning cables?
Splices a MM Fiber cable to a SM Fiber cable; used to send SM signal over MM fiber; can’t plug it directly in b/c MMF has imperfections in its core; SM signal is much hotter than MM.
Out of Band Management
a way to remotely manage a network using a secondary data link. It is an alternate path to devices at your remote sites when your primary network is down.
Cat6 cable
Standard network cables used for Gbps Ethernet connections. Max range of 100m w/speeds up to 10 Gbps. Are backwards compatible with Cat5/5e and Cat3 cables.
Cat5/5e cable
tnetwork cables with a range of 100m and speeds of 100 Mbps (Cat5) and 1 Gbps (Cat5e). Most widely used cables. RJ-45 connection type. Unshielded Twisted Pair.
Why is it important to know the max distance of various cable types?
- Physical connection is the first step in troubleshooting. is the cable plugged in?
- How long is the cable run?
If a Cat6 cable run is too long, what can you do?
- Hard code the speed at 10 Mbps
2. Hard code the line for half duplex
Straight-through cable
An Ethernet cable used when connecting unlike devices. Rtr to SW; SW to PC; SW to Server; Hub to PC
Cross-over cable
An Ethernet cable used when connecting like devices. Rtr to Rtr; SW to SW; SW to Hub; Rtr to Sever; SW to IP phone
Roll-over/Console cable
A rollover cable is a network cable that connects a computer terminal to a network router’s or switch’s console port. Usually flat and light blue in color.
