What is a Router?
A router is a device that forwards data packets along networks. A router is connected to at least two networks, commonly two LANs or WANs or a LAN and its ISP's network. Routers are located at gateways, the places where two or more networks connect, and are the critical device that keeps data flowing between networks and keeps the networks connected to the Internet.
What is a Switch?
A switch is used in a wired network to connect Ethernet cables from a number of devices together. The switch allows each device to talk to the others. Switches aren't used in networks with only wireless connections, since network devices such as routers and adapters communicate directly with one another, with nothing in between.
Although you can use the ports on the back of a router or modem to connect a few Ethernet devices together, depending on the model, switches have a number of advantages:
What is Gigabit Ethernet?
Gigabit Ethernet, a transmission technology based on the Ethernet frame format and protocol used in local area networks (LANs), provides a data rate of 1 billion bits per second (one gigabit). Gigabit Ethernet is defined in the IEEE 802.3 standard and is currently being used as the backbone in many enterprise networks.
Gigabit Ethernet is carried primarily on optical fiber (with very short distances possible on copper media).
What is a GBIC?
Short for Gigabit Interface Converter, a transceiver that converts serial electric signals to serial optical signals and vice versa. In networking, a GBIC is used to interface a fiber optic system with an Ethernet system, such as Fibre Channel and Gigabit Ethernet.
Why use a GBIC?
GBIC modules allow technicians to easily configure and upgrade electro-optical communications networks. The typical GBIC transceiver is a plug-in module that is hot-swappable (it can be removed and replaced without turning off the system). The devices are economical, because they eliminate the necessity for replacing entire boards at the system level. Upgrading can be done with any number of units at a time, from an individual module to all the modules in a system.
What is an SFP?
SFP stands for small form-factor pluggable. They function the same as a GBIC however, they are much smaller in size.
What is a XENPAK?
XENPAK is a standard that defines a type of fiber-optic or copper transceiver module which is compatible with the 10 Gigabit Ethernet (10GE) standard.
What is an X2?
In effect, an X2 functions the same as a XENPAK but is smaller in size and package.
What is XFP?
XFP is a small form factor pluggable 10Gbps transceiver. Functions the same as XENPAK and X2, but comes in a much smaller package.
What is an SFP ?
SFP is a Small Form Factor Pluggable 10Gbps transceiver. Functions the same as XENPAK, X2, and XFP but in a smaller package.
How far can a 1000BASE GBIC transmit data?
Depending on the transceiver and type of fiber used, data can be transmitted up to distances of 120km. Below are the standard distances for each type.
How Far can a 10GB (XENPAK, X2, XFP, and SFP ) transceiver transmit data?
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