Инструкция для Sweex 5 Port Gigabit Switch SW101
Модели
SW101
English version
4
W W W . S W E E X . C O M
In addition a switch has the following features:
• Package filtering and broadcast control
• Connecting several speeds within a network
• Checking packages for errors
• Building several simultaneous data paths (a 24-port Switch can theoretically handle 80 MB/s of data. A hub can handle 10 MB/s of data
• Securing the network
• Linking several ports (Trunking) in order to realise more bandwidth
• Building redundant data paths
• Connecting several speeds within a network
• Checking packages for errors
• Building several simultaneous data paths (a 24-port Switch can theoretically handle 80 MB/s of data. A hub can handle 10 MB/s of data
• Securing the network
• Linking several ports (Trunking) in order to realise more bandwidth
• Building redundant data paths
Explanation of Terminology used
10 Base-T – An implementation of IEEE 802.3 Ethernet standard on unshielded twisted pair (UTP) cable with a speed of 10 MB/s.
802.3 – Number of standards defined by the IEEE. These standards describe the CMSA/CD access protocol for Ethernet networks.
ATM – Asynchronous Transfer Mode. A LAN/WAN switched communication technology that provides a universal transport method for speech, data and
video (multimedia) over private and public networks.
video (multimedia) over private and public networks.
CRC – ( Cyclic Redundancy Check) A method for recognising errors resulting from data transfer with the help of a number of checking bits.
The checking bits, in the form of a CRC character, contain information about the number of transferred bits. The transferred bits are compared with the
number of received bits, which determines whether the transfer has been successful.
The checking bits, in the form of a CRC character, contain information about the number of transferred bits. The transferred bits are compared with the
number of received bits, which determines whether the transfer has been successful.
CSMA/CD – Carrier Sense Multiple Access/Collision detection. Ethernet access method in which each workstation in the network constantly monitors
whether data are being sent. If this is not the case and there are data to be transmitted, the workstation can start transmitting data on its own initiative.
When two workstations start transmitting simultaneously, this will result in a collision, both workstations will then wait for some time and try again.
whether data are being sent. If this is not the case and there are data to be transmitted, the workstation can start transmitting data on its own initiative.
When two workstations start transmitting simultaneously, this will result in a collision, both workstations will then wait for some time and try again.
Fast Ethernet – As long as ATM to the desktop has not been phased out completely, 100 Mbps fast Ethernet will form a good solution for users that
want more speed on their desktop for applications that require a larger bandwidth for example.
want more speed on their desktop for applications that require a larger bandwidth for example.
Flow Control – This is a (hardware/software) mechanism that serves a a buffer when the receiving station cannot process the data in time.
MAC – Medium Access Control. The bottom half of OSI layer 2, in which access is arranged to the transmission medium, such as coax cable or UTP.
OSI model - Open Systems Interconnection model. Seven-layer reference model for data communication on a network defined by the ISO (International
Standard Organisation).
Standard Organisation).
Store and Forward – Data transmission method in which data are temporarily stored on intermediate stations and then forwarded. A store-and-forward
switch will first store the entire package and verify whether there are any errors in the package, which is done with the CRC (Cyclic Redundancy
Check). Then on the basis of the destination address it is determined to which layer it should be sent, after which the switch will forward the package.
switch will first store the entire package and verify whether there are any errors in the package, which is done with the CRC (Cyclic Redundancy
Check). Then on the basis of the destination address it is determined to which layer it should be sent, after which the switch will forward the package.
Transparent Layer – Layer 4 of the OSI reference model which deals with the structure of the information exchange and the network error check
possibility.
possibility.
Trunking – Port trunking is used to decrease bandwidth at backbones and thus increase network performance.
VLAN – One of the possibilities that VLAN offers is to combine logical groups of users and network devices, so that users and servers appear to be in
the same network, irrespective of the physical location of these servers and/or users. This offers the possibility for organisations to make workgroups in
a flexible manner using a network management tool. The link between VLAN and logical workgroups is realised by a router.
the same network, irrespective of the physical location of these servers and/or users. This offers the possibility for organisations to make workgroups in
a flexible manner using a network management tool. The link between VLAN and logical workgroups is realised by a router.