A registered jack (RJ) is a physical network user interface used to affix telecommunications or data devices. The modular connection and 50-pin small ribbon connector space the most usual physical connectors used by registered jacks. However, the most famous twisted-pair connector is an RJ45 connector, an 8-position, 8-contact (8P8C) modular plug, and also jack. Which form of connector does a network interface card use?


RJ45 is a kind of Ethernet connector that is commonly used. It resembles a call jack, although that is considerably wider. Ethernet cables room at times stated as RJ45 cables due to the fact that they have an RJ45 connector on every end.

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Because RJ45 is a standardized networking interface, the “RJ” in RJ45 stands for “registered jack.” The “45” describes the interface standard’s number. An RJ45 cable comprises eight live independence wires due to the fact that each RJ45 connector has actually eight pins.

You can see the eight wires, every of which has actually a various color, at the end of an Ethernet cable if girlfriend look closely. The an initial four space solid colors, if the remaining 4 are striped.

RJ45 cables deserve to be linked in 2 ways. T-568A and T-568B space the 2 versions available.

The T-568B wiring plan is by much the most prevalent. However, the T-568A wiring system is also supported by many devices. A crossover Ethernet cable v a T-568A connector top top one end and a T-568B link is forced for part networking applications.

For example, as soon as there is no router, hub, or switch accessible, this cable type is frequently used for direct computer-to-computer communications.

Interface Cards because that Networks

A network interface card (or NIC) is forced to access the network by every maker on the web, including clients and servers. A network user interface card (NIC) is a independent card that fits right into one that the server’s motherboard expansion slots. Top top the various other hand, most modern-day computers have the NIC included into the motherboard, eliminating the require for a separate card.

Because client PCs space only offered to affix one user to the network, friend can commonly get away making use of the low-cost built-in NIC. The NIC in a server computer, top top the other hand, connects multiple network customers to the server.

As a result, it provides sense for a heavily used server come spend much more money ~ above a greater grade NIC. Many network supervisors prefer to use brand-name cards from companies favor Intel, SMC, or 3Com.

You need to utilize network interface cards v connectors that enhance the form of cable you space using. If you’re walk to use a thinnet cable to attach your network, ensure her network cards have a BNC connector. Make certain the cards have actually an RJ-45 connector for twisted-pair wiring.

Two or three connectors are obtainable on some network cards. I’ve checked out them in various configurations, including BNC and also AUI, RJ-45 and AUI, BNC and RJ-45, and all three. It’s a good idea to get a card that contains both BNC and RJ-45 ports. Friend can change from thinnet to twisted-pair cable or vice versa without having to buy new network cards this way.

Prices of network interface cards

For about $5 come $10 more each card, you can purchase both varieties of connectors. However don’t be concerned around the AUI connector. It’s unlikely the you’ll ever before use it.

The bulk of today’s NICs, well-known as 10/100 cards, occupational with both 10Mbps and 100Mbps UTP networks (that is, 10BaseT and also 100BaseT).

These cards modify their speed automatically to complement the networks. Together a result, a 10/100 map will work-related fine on a network through older 10Mbps cards. For as small as $15 per card, you have the right to have a 10/100 card. Brand-name cards room three or four times together expensive.

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Although the price the 1000BaseT cards has dropped significantly in recent years, they room still an ext expensive than 10/100 cards. 1000BaseT cards have the right to be found for less than $50, when cards with progressed capabilities like larger onboard buffers and embedded network I/O processors can price $100 or more.

Here are a couple of other points to think about when it pertains to network interface cards:

A network user interface card (NIC) is a physics layer and data attach layer device. A NIC must have actually a physical network attend to known together a MAC deal with because it create a network node. You can’t change the MAC attend to because it’s written right into the NIC in ~ the manufacturing. Therefore, every NIC ever made has actually a different MAC address. It makes it logical to use multiple NICs on server PCs. As a result, the server will be able to handle added network traffic. Two or an ext network interfaces may be integrated into a single server NIC. NICs are additionally required in fiber-optic networks. However, in many networks, fiber-optic NICs are still as well expensive for desktop use. So they’re instead used for high-speed backbones. If a server is linked to a high-speed fiber backbone, that will call for a fiber-optic NIC compatible v the fiber-optic cable.