Take notes when recap network basic in Cisco Networking Academy Course

Data Transmission

Bandwidth is capacity of the medium to carry data.
Like bandwidth, throughput is the measure of the transfer of bits across the media over given period of time, but affected by factors such as latency.
Kbps < Mbps < Gbps < Tbps

Home Network

Port

Small business and home routers which have wire/wireless accessiblity typically have two primary types of ports:

• Ethernet Port(LAN/Ethernet): These ports connect to the internal switch portion of the router. All devices connected to the switch ports are on the same local network.
• Internet Port(WAN): This port is used to connect the device to another network. The internet port connects the router to a different network than the Ethernet ports. This port is often used to connect to the cable or DSL modem in order to access the internet.

Category

Wireless LAN(WLAN)

For frequencies, WIFI is in unlicensed 2.4GHz ~ 5GHz frequency ranges.Bluetooth is 2.4GHz band.
IEEE 802.11 is setting up wireless technical standards. If devices on your wireless network that are using a variety of different 802.11 such as 802.11b, 802.11g, 802.11n or mixed mode(->).
A mixed mode wireless network environment can include devices that use any of the existing Wi-Fi standards. This environment provides easy access for older devices that need a wireless connection but do not support the latest standards.
WI-FI Alliance is testing wireless LAN devices from different manufactures.
SSID(Service Set Identifier) to identify a specific wireless network

Wired network

• 5e cable(blue color): used in LAN
• coaxial cable: surrounded by tubular insulating layer
• fiber-optic cable:very high bandwidth

Lab:Configure wireless router and client

Device Connections:

• Used a coaxial cable to connect the splitter to both the modem and TV
• Used straight-through copper Ethernet cables to:
  Connect the home wireless router’s WAN port to the modem
  Connect all PCs to the router’s LAN ports
• Connected laptops wirelessly

Wireless Router Configuration:

• Configured the router to act as a DHCP server (enabled by default).This allows LAN devices to automatically obtain private IP addresses
• Accessed the router’s web GUI and:
  Set up a strong password
  Selected WPA2-Personal security with AES symmetric key algorithm
  Changed the network name (SSID) from default to “MyHome”