Ethernet and wireless
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defined by the official standard of IEEE802.3, which describes the settings or rules for devices to communicate with each in a single location.
media access method used by all forms of Ethernet
multiple signals being transferred at the same time
only one signal at a time
Flavors of Ethernet-
Plain Ethernet- (10 mbps bandwith, baseband, original version) Fast Ethernet- still the most popular type used today, most likely used in the classroom 100 mbps Gigabit Ethernet- even faster, 1 billion bits per second TenGigabit Ethernet
How an Ethernet network works-
there is a patch cable (typically called Ethernet cable) which connects to computers NIC (network interface card) on one side and the switch on the other side
connectivity device to connect all network components together within Ethernet network, It uses MAC address tables to determine on which connectivity port the destination node is attached to, move the data that is being sent by one device/computer to the correct destination device/computer, heart of wired LANS and can also create a VLAN (virtual LAN-appears to be another network but it isn't), data link layer of OSI model
network connectivity device used to connect networks using the IP address, does NOT connect computers (role of switch), is NOT the same as a wireless router found in stores, network layer of OSI model.
a process that routers are then responsible for to find the best path for data in order to reach the destination quickly.
millions of networks connected together through routers
A frame is the actual chunk of data transmitted from machine to machine, data referred to as a packet, sequence of 0's amd 1's must match for data to be received and accepted, *64-1500 bytes in size
without wires, can use radio frequency wavesuency waves, The standard that rules how these networks can be set up and configured is the IEEE 802.11 (Wi-fi), the most current standard is IEEE 802.11ac 802.11 n is also common and uses UNII band
Two radio frequency bands-
The ISM band and the UNII band. The ISM band which stands for Industrial Scientific and Medical band, runs in the 2.4 GHz range, and the UNII (unlicensed National Information Infrastructure) which runs in the 5.8 GHz range
The lower the frequency, the further it is able to travel The higher the frequency, the more data that it can pack
wireless network that connect all devices without a wireless router nUses no Access Point nCreate network connections to other Stations with little configuration required nIndependent Basic Service Set
wireless network that connects through wireless router nConnects to a Wired LAN nUses Access Points nFaster than Ad hoc nMore secure- devices must be authenticated and you can enable encryption
name given to the WiFi network
Protecting the Wifi network-
-disable DHCP service to prevent others from getting the IP address - you can change the IP address - change the default SSID change frequency channel Disable the broadcast of the SSID by the wireless router enable encryption use the Mac address to allow for certain devices decrease the transmission power being used by your wireless router Access Restrictions change the router’s setup access password
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