Easy stuff, slightly opinion oriented

Happy Monday! I hope every one had a wonderful weekend and is super excited about Monday! I know I am! I’m ready to listen to people and learn today. Maybe say a few things myself but unlikely as you can tell my platform for expressing my self isn’t exactly popular haha. Any way, lets get into the usual stuff.

 photo multimode_zpssndbwxtw.jpg

So I’m starting to get this whole cabling thing but if you don’t know any thing about it, its gets a little confusing. Much like encryption types on the Security+ which I started studying for and decided to do this one first. Really I could have gone for the A+ too but I wasn’t really sure it was worth the money to be honest. Anyway lets take a look at the distance ratings for these cables.

  • Cat 5e – The maximum length you can run Cat5, Cat5e, Cat6 and Cat6a cable is 100 meters or 328 feet
  • Cat 6e – unclear based on google results but it does appear to be 328 feet
  • Multimode – Typical transmission speed and distance limits are 100 Mbit/s for distances up to 2 km (100BASE-FX), 1 Gbit/s up to 1000 m, and 10 Gbit/s up to 550 m
  • Coaxial – Using coaxial cable increases this distance to 500m (1640.4 feet)

I mean, you could use coax according this but we can go with multimode fiber.

 photo collision domain_zpssudjvh4n.jpg

This one is a little more confusing to me. I also cant prove that the 4 port hub is one domain and that 12+2+1=14 somehow. I guess maybe we don’t count the hub? That’s the most logical explanation but I’m still not sure.

 photo docsis_zpszoiyzzyw.jpg

I think all i need to do is define docsis: Data Over Cable Service Interface Specification, or DOCSIS. Ok, easy.

 photo transceiver types_zpsr36asy0z.jpg

This is a list question.

  • MDF – Short for main distribution frame, a cable rack that interconnects and manages the telecommunications wiring between itself and any number of IDFs. Unlike an IDF, which connects internal lines to the MDF, the MDF connects private or public lines coming into a building with the internal network
  • MT-RJ – MT-RJ stands for Mechanical Transfer Registered Jack. MT-RJ is a fiber-optic Cable Connector that is very popular for small form factor devices due to its small size. Housing two fibers and mating together with locating pins on the plug, the MT-RJ comes from the MT connector, which can contain up to 12 fibers.
  • BNC – coax connector
  • GBIC – A gigabit interface converter (GBIC) is a transceiver that converts electric currents (digital highs and lows) to optical signals, and optical signals to digital electric currents. The GBIC is typically employed in fiber optic and Ethernet systems as an interface for high-speed networking.
  • F-type – BNC (Bayonet Neill-Concelman) RF connectors make it easy to connect coaxial cables with radio-frequency equipment like radios and TVs, composite video on commercial video devices, and ethernet networks. … And they come in handy when you need to combine them with, say, an RCA connector on the end of the coaxial cable

Ok, that makes sense with the assumption that GBIC is super fast.

 photo plenum cat 5_zpsfyzosl4p.jpg

Honestly, I’m not sure why cat6 is needed but ok. However, so that we are aware: Plenum rated cable has a special insulation that has low smoke and low flame characteristics. Plenum cable is mandated to be installed in any “air handling” space. For example, most large office buildings use the ceiling to return air to the AC unit.

That’s all for tonight! Fairly simple stuff.

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