MOD 4 - CCNA1

Encoding

converts the stream of bits into a format recognizable by the next device in the network path

Bandwidth

is the capacity at which a medium can carry data

Digital Bandwidth

measures the amount of data that can flow from one place to another in a given amount of time; how many bits can be transmitted in a second

Latency

Amount of time, including delays, for data to travel from one given point to another

Throughput

The measure of the transfer of bits across the media over a given period of time

Goodput

The measure of usable data transferred over a given period of time

Copper Cabling

is the most common type of cabling used in networks today

Attenuation

the longer the electrical signals have to travel, the weaker they get. • The electrical signal is susceptible to interference from two sources, which can distort and

Unshielded Twisted Pairs

is the most common networking media.

Shielded Twisted Pair

Better noise protection than UTP

Wireless installations

attach antennas to wireless devices

Cable internet installations

customer premises wiring

Cancellation

Each wire in a pair of wires uses opposite polarity. One wire is negative, the other wire is positive.

Enterprise Networks

Used for backbone cabling applications and interconnecting infrastructure devices

Fiber-to-the-Home (FTTH)

Used to provide always-on broadband services to homes and small businesses

Long-Haul Networks

Used by service providers to connect countries and cities

Submarine Cable Networks

Used to provide reliable high-speed, high-capacity solutions capable of surviving in harsh undersea environments at up to transoceanic distances.

yellow cables

it is for single-mode fiber cables and orange (or aqua) for multimode fiber cables.

Optical fibers

is primarily used as backbone cabling for high-traffic, point-to-point connections between data distribution facilities and for the interconnection of buildings in multi-building campuses.

Coverage area

Effective coverage can be significantly impacted by the physical characteristics of the deployment location.

Interference

Wireless is susceptible to interference and can be disrupted by many common devices.

Security

Wireless communication coverage requires no access to a physical strand of media, so anyone can gain access to the transmission.

Shared medium

WLANs operate in half-duplex, which means only one device can send or receive at a time. Many users accessing the WLAN simultaneously results in reduced bandwidth for each user.

Wireless Access Point (AP)

Concentrate wireless signals from users and connect to the existing copper-based network infrastructure

Wireless NIC Adapters

Provide wireless communications capability to network hosts