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*Difference Between Slot And Port Chester
*Difference Between Slot And Port Forwarding
*Difference Between Slot And Port Orford
*Conversion between PS/2 and USB. Many keyboards and mice were specifically designed to support both the USB and the PS/2 interfaces and protocols, selecting the appropriate connection type at power-on. Such devices are generally equipped with a USB connector and ship with a passive wiring adapter to allow connection to a PS/2 port.
*Slots and ports are physical connection points that allow the hardware of a computer to be expanded. A port is a socket. A slot is a dock for a printed circuit board.
So if you want to find out whether the USB port on your computer or USB flash drive is 2.0 or 3.0, you can distinguish them by the USB port color inside. Another physical difference between USB 2.0 and USB 3.0 is the number of wire connections. USB 2.0 has a total of 4 connector wires, supporting half-duplex communication. The only benefit of using this port for this purpose is that 1) it’s usually the first port, HDMI 1, which means it’s easy to skip to when using the input selection button and 2) HDTVs with this port designation typically have additional buttons for the set-top box (or additional functionality related to it). A slot port uses a wall of the box as one (or more) port walls and requires a correction in the calculation a square port uses none of the box walls. Has 4 pieces of wood to make the port).
In Gigabit Ethernet applications, either SFP port, RJ45 port or GBIC port is used in different Gigabit devices, such as switches, routers, servers and storages. And some latest wireless access points (APs) are also equipped with SFP port. Since all these three port types only support 1Gbit and do not go any higher, why are they created instead of using only one type?SFP Port vs. GBIC Port: An Improvement in Dimension
SFP port and GBIC port can be found in a variety of equipment, including Ethernet switches, routers, network interface cards, servers, etc. Today most Ethernet switches are designed with as least one or two Gigabit SFP uplink slots. What is SFP port? As the name implies, SFP port is intended for taking in SFP (mini-GBIC) fiber modules with small form-factor (SFF) connectors, while GBIC port is for accepting GBIC modules.
The two types of ports can provide the same data rates and same distances in Gigabit applications, but the same number of SFP ports uses less space than that of GBIC ports. Since they have the equal functionality, SFP has gradually taken the place of the older GBIC in Gigabit networking for space-saving and economical reasons. The table below is a comparison of SFP port vs. GBIC port.ParameterSFP PortGBIC PortSupported Optical ModulesSFP transceiver (single-mode/multimode, simple/duplex, CWDM/DWDM)GBIC transceiver (single-mode/multimode, simple/duplex, CWDM/DWDM)Transceiver Receptacle TypeLC, RJ45SC, RJ45Supported Standards1000BASE-T, 1000BASE-SX, 1000BASE-LX, 1000BASE-LX10, 1000BASE-LX/LH, 1000BASE-LH, 1000BASE-EX, 1000BASE-ZX, 1000BASE-BX, 1000BASE-CWDM, 1000BASE-DWDM.Supported DistancesUp to 100 m, 300 m, 2 km, 10 km, 20 km, 40 km, 80 km, 100 km, 150 km.Module DOM FunctionModules support digital optical monitoring (DOM) function, providing real-time monitoring of transceiver’s operation temperature, optical input, optical output, laser bias current and supply voltage.
If you want to know more about the SFP types that the SFP port support and their detailed specifications, such as wavelengths and distances, you can read: How Many Types of SFP Transceivers Do You Know.SFP vs. RJ45 port: Distance Makes Difference
The RJ45 ports in Gigabit networking devices follow the 1000BASE-T Ethernet standard. They only support twisted pairs for network connections, and the distance is limited to 100 m (330 feet). RJ45 port uses Category 5/5e/6 and higher level copper Ethernet cables for 1Gbit transmission. Compared with switch using only RJ45 port, SFP port switch supports more types of communication cables and longer reaches of links. Here are the differences between SFP vs. RJ45 port.ParameterSFP PortRJ45 PortConnection Cable TypesMultimode fiber cable, single-mode fiber cable, twisted pairs (Cat5, Cat6 or higher).Twisted pairs (Cat5, Cat6 or higher).Max. Transmission DistanceMMF (550 m), SMF (150 km), Cat5 (100 m)100 m (330 ft)Data Rate1000 Mbps (1G)1000 Mbps (1G)
Since most end-points at the customer’s are still using RJ45 port, in order to retaining the convenience of RJ45 port while providing the advantage of SFP network to customers, some switches include combo SFP/RJ45 ports. So users can choose to utilize either the SFP port or the RJ45 port at a time for short-distance connections.What Is Dual-Rate SFP Port?
Unlike the combo SFP/RJ45 port which is actually a link shared by two different ports, a dual-rate SFP port is one single SFP slot that can be configured to support two different data rates. Generally a dual-rate SFP slot can set to be either 1G mode or 10G mode, i.e., an SFP module or an SFP+ module can be installed in it. But the actual data rate of the transmission depends on the mode being settled and the transceiver module being used. How to win at online craps games. There are several cases:
*The dual-rate SFP slot is 10G activated, and an SFP+ module is installed; the interface is in 10G mode.
*The port is 10G activated, but an SFP module is installed; the interface is in 1G mode.
*The port is not 10G activated, but an SFP+ module is installed; the interface will be link down state.
*The port is not 10G activated, and an SFP module is installed; the interface is in 1G mode.Summary
The three port types—SFP port, RJ45 port and GBIC port—are used in different networking equipment. The SFP port is now more commonly used than GBIC port since the former one provides the same function and is more compact. When SFP port vs. RJ45 port, SFP port supports connectivity through varieties of fiber cables and the copper twisted pairs, and a wide range of link distances, but RJ45 port accepts only twisted pair cables and a shorter distance. Since every thing has both two sides, it is not always the best to choose SFP slot. The two articles: GBIC vs SFP: When It’s Best to Use GBIC and When to Use SFP, and RJ45 vs SFP: Which Should I Use to Connect Two Switches, specifically discussed when to use which port/module type.

This content has been archived, and is no longer maintained by Indiana University. Information here may no longer be accurate, and links may no longer be available or reliable.
PCMCIA is an acronym for Personal Computer Memory Card InternationalAssociation; the acronym is pronounced as separate letters. PCMCIA isa non-profit trade association and standards body consisting of some500 companies. PCMCIA has developed a standard for small, creditcard-sized devices, called PC cards, that are often used in notebookcomputers. (Adapters are available that allow PC cards to be used indesktop computer systems.) You can visit the PCMCIA web site at:
In the past, the cards were known as PCMCIA cards, but they are nowreferred to as PC cards, PC card hosts, and PC card software.PCMCIA refers to the association and standards body.
A PC card slot is an expansion slot often found in notebook computersthat allows for the easy and quick addition of a host of differentdevices. Originally designed for adding memory to portablecomputer systems, the PC card standard has been updated several timessince its original creation.
PC cards are Plug and Play devices that are often hot-swappable (i.e.,cards may be removed and inserted with the computer power turned on,without rebooting) under Mac OS and Windows 95and beyond. (Windows NT, however, has more limited supportfor PC cards, and you cannot change cards on the fly.) Many systemswill give a familiar beep sound from the computer’s speaker when youremove or insert a card.Differences between PC cards
There are three different types of PC cards. All three have the samerectangular size (85.6 by 54 millimeters), but different thicknesses.
*Type I cards can be up to 3.3mm thick, and are used primarily for addingadditional ROM or RAM to a computer.
*Type II cards (the most common) can be up to 5.5mm thick. Thesecards are often used for modem, fax, SCSI, andLAN cards.
*Type III cards can be up to 10.5mm thick, sufficiently large forportable disk drives. Differences between PC card slots
As with the physical PC cards, PC slots also come in three sizes:
*A type I slot can hold one type I card
*A type II slot can hold one type II card, or two type I cards
*A type III slot can hold one type III card, or a type I and typeII card.
Most notebook computer systems come with two PC card slots that allowfor the use of two type I or type II PC cards and one type III PCcard. The PC card slots are stacked with one above theother. Usually, type III PC cards fit only in the bottom slot.Common PC card devices
Following is a list of common PC card devices:
*CD-ROM interface
*Cellular phone interface
*Security tokens
*Docking station interface
*10Mbps Ethernet LAN adapters
*100Mbps Ethernet adapters
*GPS (Global Positioning System) cards
*Hard drives
*Infrared wireless LAN adapters
*ISDN cards
*Joystick interface cards
*Memory cards
*Modem and Ethernet combination cards
*Parallel port interface
*SCSI adapters
*Serial port interface
*Sound cards, input and output
*Video capture/frame grabber cards
*Video teleconferencing cardsCardbus
Many laptop manufacturers now advertise their PC card slots as cardbuscompatible, or they simply identify the slots as cardbusslots. Cardbus is an extension of the latest PCMCIA standard, whichexpands the bus bandwidth and throughput to 32bits at 33MHz. In contrast, the older PC card standard was16 bits at 8MHz. Cardbus is analogous to the PCI slots in desktops,while the older PC card standard is analogous to ISA. The newercardbus slot can accommodate an older 16-bit PC card, but an older PCcard slot cannot accept newer cardbus cards. To tell if your PC cardis cardbus, look on the interface end of the card. Cardbus deviceswill have a notched metal plate on that end.
While not technically accurate, some vendors and technicians refer tothe older style 16-bit PC card as PCMCIA in order to contrast it with32-bit cardbus cards, which makes them sound like competingstandards. However, cardbus is an extension to the PCMCIA standard,not a replacement.Difference Between Slot And Port Chester
For additional information, see:Difference Between Slot And Port ForwardingExpressCardDifference Between Slot And Port Orford
The latest extension of the PCMCIA standard is calledExpressCard. This standard is being built on the latest USB2.0 and PCI Express buses. The aim is to increase speed and reducesize, cost, and complexity. One of the ways it does this is toeliminate the PCMCIA Host Controller in favor of using the USB or PCIExpress controller directly.
For additional information, see:
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