Learn your hosting! - Cables
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Category : Technology and Devices,
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08-11-2014, 12:49 AM
Nomenclature of Port Speed:
Ethernet - Ethernet generally means an ethernet cable or physical port that is capable of
10 Mb/s transfer rate. This means that 10,000 bits represented in frequencies on the cable, can be carried across a single point per second.
FastEthernet - This means that an ethernet cable or physical port is capable of a 100Mb/s transfer rate. This means that it supports 100,000 bits per second.
Gigabit Ethernet - This means that an ethernet cable or physical port is capable of a 1Gb/s transfer rate. This means that it supports 1,000,000 bits per second.
Other important terms: MDI/MDIX/AutoMDIX - Medium Dependant Interfaces (X = Crossover) is the
connection type. Depending on the type of connection used is the type of cable that you should use. I‟ll explain “crossover vs straight through” next. Modern switches use AutoMDIX which is capable of automatically detecting the connection type (MDI or MDIX) so a crossover cable can be a bonus.
Straight Through vs Crossover Cable
Straight through cables carry data in one direction only. They can either send or receive data, but not at the same time. Conversely, crossover cables must be able to send and receive data simultaneously. This is achieved by crossing wires inside the cable (of course they are pre- crossed and you don‟t have to do it yourself. Here is a diagram of the wires inside each cable:
Straight Through Cable:
A ============== A
B ============== B
C ============== C
D ============== D
E ============== E
F ============== F
G ============== G
H ============== H
Crossover Cable:
A ============== C
B ============== F
C ============== A
D ============== D
E ============== E
F ============== B
G ============== G
H ============== H
Console Cables - A console cable connects to serial pins in the router/switch in order to access the command line interface. Note that this is different terminology than a serial connection. The device connecting through console do not need to be connected to the network.
Serial Cables - A serial connection is used to connect multiple routers together through a WAN (Wide Area Network). Serial connections can be configured by your ISP which can allow your network to span across multiple geographic locations.
Copper Ethernet Cables (CAT = Category):
Connecting Devices
When connecting devices, there are a few rules you should remember. When connecting like devices via Ethernet, always use a crossover. With the exception of a Router and Host Computer, when connecting different devices, connect with a straight-through.
With the Auto-MDIX feature of many current devices, you may feasibly be able to connect any cable to it. However, it‟s still great to know the connections between devices.
Diagram I found:
![[Image: 40a859802e2199ce7481271d4a06dbf4.png]](http://gyazo.com/40a859802e2199ce7481271d4a06dbf4.png)
Ethernet - Ethernet generally means an ethernet cable or physical port that is capable of
10 Mb/s transfer rate. This means that 10,000 bits represented in frequencies on the cable, can be carried across a single point per second.
FastEthernet - This means that an ethernet cable or physical port is capable of a 100Mb/s transfer rate. This means that it supports 100,000 bits per second.
Gigabit Ethernet - This means that an ethernet cable or physical port is capable of a 1Gb/s transfer rate. This means that it supports 1,000,000 bits per second.
Other important terms: MDI/MDIX/AutoMDIX - Medium Dependant Interfaces (X = Crossover) is the
connection type. Depending on the type of connection used is the type of cable that you should use. I‟ll explain “crossover vs straight through” next. Modern switches use AutoMDIX which is capable of automatically detecting the connection type (MDI or MDIX) so a crossover cable can be a bonus.
Straight Through vs Crossover Cable
Straight through cables carry data in one direction only. They can either send or receive data, but not at the same time. Conversely, crossover cables must be able to send and receive data simultaneously. This is achieved by crossing wires inside the cable (of course they are pre- crossed and you don‟t have to do it yourself. Here is a diagram of the wires inside each cable:
Straight Through Cable:
A ============== A
B ============== B
C ============== C
D ============== D
E ============== E
F ============== F
G ============== G
H ============== H
Crossover Cable:
A ============== C
B ============== F
C ============== A
D ============== D
E ============== E
F ============== B
G ============== G
H ============== H
Console Cables - A console cable connects to serial pins in the router/switch in order to access the command line interface. Note that this is different terminology than a serial connection. The device connecting through console do not need to be connected to the network.
Serial Cables - A serial connection is used to connect multiple routers together through a WAN (Wide Area Network). Serial connections can be configured by your ISP which can allow your network to span across multiple geographic locations.
Copper Ethernet Cables (CAT = Category):
Connecting Devices
When connecting devices, there are a few rules you should remember. When connecting like devices via Ethernet, always use a crossover. With the exception of a Router and Host Computer, when connecting different devices, connect with a straight-through.
With the Auto-MDIX feature of many current devices, you may feasibly be able to connect any cable to it. However, it‟s still great to know the connections between devices.
Diagram I found: