Engineering Discipline Computer Systems Devices
Engineering Discipline Computer Systems Devices
Engineering Discipline Computer Systems Devices
TYPES OF CABLES
Straight Through Cables.
These are normally used for a serial to serial connection. Before the
days of networking this was one of the best ways to connect
computers together and is still used on unix machines as a primary
method of connecting to the console.
USB Cables
Primarily used for the new standard of printing. Now used in many
different applications such as Cameras, phones and even
playstations. One can even do USB to USB LAN Connections. There
are currently two versions, USB1 and USB2. USB1 being 12MBps
transfer speed whereas USB2 runs at 480MBps (MBps is the Mega
Bits per second transfer speed).
Internal PC Cables
Network Cables
There are two standards of Network cables, Cat5e and Cat6e. Within
these two standards there are two formats, straight through
(standard) and crossed. The difference being that straight through s
used in general networks throughout companies and is used for
connecting computers to network wall sockets and from network patch
panels to network switches (hubs). For smaller networks, i.e. two
computers, a cross over cable is used between two computers which
have network cards to allow them to talk to each other.
Difference of speed between Cat5e and Cat6e is generally thought to
be 100MBps for Cat5e and 1000MBps for Cat6e network cables.
Although in reality Cat5e can run at 1000MBps but is not correctly
shielded to do so.
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The modem cable connects the telephone socket to a router or modem. The
socket for connection to the modem or router is known as an RJ11 cable,
which is the American telephone standard. There are two types of modem
cable, one being the standard telephone wire being used by BT and other
telephone suppliers. The other type being a Cat5e cable shielded to allow
faster connection for fast broadband lines.
These allow two computers to talk to each other directly through their serial
(RS232) ports. The null modem cables are useful for allowing portable
computers to connect to larger systems.
Firewire Cables
Firewire is the next step on from USB cables commonly used in digital
cameras, phones, laptops etc. The latest firewire cables now reach speeds of
800MBps. They also give serial ATA a run for its money as a lot of hard drive
caddies are now firewire compliant.
SWITCHES
A network switch is a
computer networking device
that connects network
segments. In the past, it was
faster to use Layer 2 techniques to
switch, when only MAC addresses
could be looked up in
content addressable memory
(CAM). With the advent of ternary
CAM (TCAM), it was equally fast to
look up an IP address or a MAC
address. TCAM is expensive, but
very appropriate for enterprise
switches that use default routes
plus a moderate number of other
routes. For routers that need a full
Internet routing table, TCAM may
not be cost-effective.
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Rack mounted
Non-rack mounted, typically intended to be used in a
Traffic monitoring on a
switched network
Unless port mirroring or other methods
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THANK YOU
EVERYONE
.
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