connecting two devices directly, output of one to input of the other, To connect which two devices do we use crossover cable? @Alisina. Everything we covered above is 100% correct. e.g. Basically, we classifiy equipment into DTE (Data Terminal Equipment) and DCE (Data Circuit Equipment). Hence if you connect two devices of the same type, you use a cross over cable. As we previously mentioned, you can use the same wiring diagrams and instructions shown above to build a crossover cable. Crossover cables aren't needed very much anymore. Understanding the use case for a crossover cable is not that difficult. There have been times I couldn’t connect at all and that is when I experimented with a crossover cable. Pingback: Steps On How To Make A Ethernet Crossover Cable-The How To Man. Thanks for the feedback. sir i have some doughts Just as how you came up with an excellent explanation to understand it, I have found an excellent explanation to remember it. Thus, a router and a router would use a crossover cable to connect, a router and a switch would use a straight-through cable, but a router and a PC would use a crossover cable. A crossover cable redirect the output of one RJ-45 port into the input of … 1) You can and probably will see something on your CCENT or CCNA exam about what type of cable should be used or a scenario where the wrong type of cable is being used and you need to be able to pick that out to troubleshoot the issue. My point, I did not know about cross-over cables and so everything works using straight through cables. The pc or laptop is connected with a rollover cable and the other end of the cable is connected to the switch. Maybe my Netgear D6200 router is smarter enough to figure it out? The cable crossover is a great chest exercise because it stretches the pecs from the start position, hitting the outer pec muscle fibers. The History of the PIX/ASA (TAC Security Podcast), View all posts by Paul Stewart, CCIE 26009 (Security), http://cciepursuit.wordpress.com/2007/07/08/switch-cabling-and-auto-mdix/, Steps On How To Make A Ethernet Crossover Cable-The How To Man. Comment. You may be familiar with different color coding of the older T-568A standards so please note that they are different. Crossover cables should only be used for direct network connections. You shouldn’t. Watch Question. Gigabit NIC’s typically automatically does a crossover as necessary. Router <> Router (crossover) How are those two like devices??? | Hub | | Servers | In the left box, write “Hub” and “Switch”. Wow, so there was a lot more to the differences and when to use a standard Etherent Patch cable versus an Ethernet Crossover Cable. Key Concept–Two devices in the same category use a crossover cable It's a cable used to connect two computers together for the purpose of direct communication. ), Group 1 Group 2 But then you have the scenarios like you will use an Ethernet Crossover Patch cable if you are connecting a PC to a Router. The Purpose of Crossover Cables. For the CCNA exams, it is important to understand which cable is appropriate, a crossover or straight through cable. Crossover Cables are offered in CAT 5, CAT 5e, and CAT 6. This is for Netflix because it knows if you are behind a proxy so I have a choice of UK or Italy all around the house depending on the device. B)Straight Through I do agree that it is always a good idea to have a cross over cable handy just in case. Router to router connections would often use crossover cables, and if you wanted to connect two PC's together without a switch, you would need a crossover cable between them. So that is why when you test our your cables you may see that if you connect your PC to your router directly with a patch cable it will work on a newer PC that is Auto-MDIX but will not work on an older PC that is not Auto-MDIX. I read that difference between straight through cables and crossover cables is that you connect two same different devices using straight-through, yet you connect two same devices In the right box, write, “PC”, “Router”, “Servers”, “APs”. An Ethernet crossover cable is a type of Ethernet cable used to connect computing devices together directly. // ]]> Hi, Such a distinction between devices was introduced by IBM.. To easily understand where to use a crossover cable, we need to examine a couple of key concepts. The same holds true if you are daisy chaining two Cisco switches. You don’t get to really experience these things in a CCNA simulator. | | | | A benefit of using the Crossover Cable is that exercises that take place on a bench generally pin down the Scapulae and reduce the range of motion. For example; when you go to connect two routers directly together via their fast Ethernet ports, you will use an Ethernet Crossover Patch cable. __________ _________ Huh? So let’s test our knowledge. Packet Tracer, GNS3, VIRL, Etc vs a Real CCNA Lab. As such, these specific cards act like a switch. I appreciate your effort. That is the wrong approach. So why did we cover this information? When a Man connects with a Woman he uses his boner with is somewhat straight or just straight, which represents the straight line. Therefore, you CAN’T USE a STRAIGHT line to connect them… so you should NOT use a straight through cable. If it isn’t a switch or a hub it goes into category two. There are also some routers that use integrated switches. That's why you need a crossover cable. The confusion is a result of people trying to memorize all of the scenarios for which a crossover is used. A crossover cable connects two devices of the same type, for example DTE-DTE or DCE-DCE, usually connected asymmetrically (DTE-DCE), by a modified cable called a crosslink. Here goes; I use Man and Woman. It is funny that this still comes up time to time. As a result no one really has to learn the correct use. It could be A (typical cable for bootstrapping a Cisco), B (are we talking about a router with an integrated switch–aka most every homo and SOHO router, or does it do Auto-MDIX) or C (the correct CCNA answer). Now as Gerard said on the more "fancy" equipment of that era there was a mid-x switch that would toggle the transmit and receive pairs around simulating a straight through or crossover cable with just a flip of a switch. So the simple and correct answer is that this first category only includes switches (and hubs if you have any of those left). Any time that we are connecting a device from one category to a device in the other category, we use a standard straight through cable. ( I hope the format comes out okay when this posts. It is the real hands-on experience that helps cement these types of things in your head for your CCENT or CCNA exam. In this case, you will need to configure static IP addresses for each computer. I have my incoming router (Italy IP) attached to 2 hubs (UK IP – 1 upstairs and 1 downstairs). However as we continue to progress technologically; the industry tries to make things stupid-proof. In regard to physical appearance, Crossover Ethernet cables are very much similar to regular Ethernet cables. To determine if you have a straight-through or crossover cable, compare the Ethernet cables to see if … These are all real world scenarios and cables that you will come across in your day to day job duties. 1.why to use cross cable(T568a) in between the system and cisco 300mbps access point? Modern switches can use auto-mdix to automagically make it work if you use a straight through cable. What is in the second category? Paul This was a wonderful explanation for someone like me who really has no CCNA experience. A crossover Ethernet cable is a type of Ethernet cable used to connect computing devices together directly. What Is Crossover Cable? In any case, any connection between two like interfaces traditionally require a crossover cable. Well I guess someone could argue that there are routers with ESW (ethernet switch modules or cards), but their name pretty much tells us that they are a switch that is inserted into the router. Problems connecting computers via crossover cable may use a cable tester for troubleshooting. In a nutshell, if you are going from like device to like device, you will use an Ethernet Crossover Patch cable. // Switch (straight through). The crossing of wires in a cable or in a connector adaptor allows: . This is really easy–everything else. Here’s a great blog post that explains the possible problems with auto-mdix and incorrect cabling, http://cciepursuit.wordpress.com/2007/07/08/switch-cabling-and-auto-mdix/. Now we will look at the pinout of an Ethernet crossover patch cable using the T-568B standards. For example, if you give one computer an IP address of 192.168.0.1, then you should give the second com… In those cases, they are assuming there is no such thing as auto crossover. When To Use Crossover Cable You should use the Crossover Cable when performing a Cable Crossover, or other cable exercises that require the use of the Crossover Cable machine. Again, in practical use most devices nowadays use auto-MDI, so it usually doesn't matter. Man is in First category and Woman is in the Second Category. Usually, if you are using a crossover cable to connect two computers, the computers are not connected to a LAN network. If we ever need to connect two devices that are in the same category, we should be thinking about a crossover cable. Most modern network devices have a function called auto-mdix which will allow the incorrect use of straight through and crossover cables. So if the device on one end of the link is newer, it generally masks this legacy issue. This allows for two devices to communicate at the same time. Basically what that means is you don’t have to think if your ports are Auto-MDIX and they will automagically cross or uncross themselves to work with your cable. Perhaps auto sensing is part of the specification for the speed in question. So how does one know which cable to use? These are two really good examples of the value of having your own lab versus using a simulator like PacketTracer or GNS3. Plus I always have an RJ45 coupler handy in case I have to combine two cables. To be complete, this includes the following: routers (except ESW ports), print servers, PCs, access-points, servers, and any other Ethernet connected device. Unlike straight through cable, the RJ45 crossover cable uses two different wiring standards: one end uses the T568A wiring standard, and the other end uses the T568B wiring standard. To connect 2 like devices you need to use a cross over cable. Start Free Trial. It is also worth mentioning that in practice auto-mdix has been available for many years and makes this discussion a non issue in most real world cases. I was told it was very easy and just go take it the next day. The Ethernet Straight-thru Patch cable and the Ethernet Crossover patch cable. I took a new postion recently and had to get my Network+ certification(currently 13 year network engineer). Attempting to connect a computer to an old router or network switch with a crossover cable instead of a normal cable can prevent the link from functioning. Questions about this page can be directed to mike@cctvcamerapros.net. By contrast, straight through patch cables are used to connect devices of different types, such as a computer to a network switch. | Switch | | PC | 2.all devises must having the ip address and mac address? I would suggest visualising it like this to make it easier to remember. I hate memorizing, so I always recommend simply understanding that we have two categories of Ethernet devices. Now we can go back to the previous concept and apply it to these categories. There’s no “preview button”! So I did (and passed). Well for two reasons. Crossover cables use two different wiring standards: one end uses the T568A wiring standard, and the other end uses the T568B wiring standard. If you connect a HUB to a SWITCH, your line will move out of the group 1 box, and bend back into the group 1 box, to join up with “SWITCH”. Rollover cable is used when the computer terminal console into a cisco router or a switch. [CDATA[ CertificationKits CCENT & CCNA Lab Certification Kits. Generally speaking, you will need to use a cross-over cable when connecting two similar equipments, like switch-to-switch or router-to-router. connecting two routers or two switches or two computers. CCNA 200-301 Exam Troubleshooting Questions! The prior post covered the different types of cables required to connect to your Cisco router or Cisco switch so you could console into it. Then, within a few minutes, I can then connect from Windows 10. It is widely used to connect two devices of the same type: e.g., two computers or two switches to each other. If you want to connect two computers directly via their Ethernet ports, you could use something called a crossover cable – but you may not have to. I get the frustration, answer to a question should be technically the same regardless of whether it is being asked by Comptia, Cisco or Jack and Jill’s pre-hire technology testing. That cable swaps the transmit and receive pairs in the network cable. Crossover cable is used to connect two or more computing devices. The upper floor hub then connects to an 8 port managed switch that feeds cable connected devices (Pc, printer, Amazon Fire TV, PS3, Sky decoder and TV, NAS) so they each have a UK IP. my friend was asking these questions It depends. Key Concept–Two devices in the same category use a crossover cable. MDIX would let me use either to connect to the NIC and rolloever would let me connect to the console port. I chose cross over anyway. For example; when you go to connect two routers directly together via their fast Ethernet ports, you will use an Ethernet Crossover Patch cable. A crossover cable can be used to connect two devices together WITHOUT a switch in between the devices. Patch Cables vs. Crossover Cable: When to Use? So let’s start off our two common CCNA lab LAN cables. However I recently encountered an exam practice question that asked when a cross over cable should be used, two of the three correct answers were: when connecting a switch to a hub Thanks alot Paul, Blog is very useful. Any time that we are connecting a device from one category to a device in the other category, we use a standard straight through cable. Crossover cables are used when you are connecting two devices of the same type together. plus a rolled cable for console access to network devices. This concept stated that when connecting two devices in the same category, a crossover cable was appropriate. 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