Room) and Network DesignThe Inter-device subsystem consists of cables, connectors, and related supporting hardware in the equipment room to interconnect various public system devices. The main devices are digital switches, computer network devices, servers, and building automation equipment hosts. They can be put together or set separately. In large-scale integrated wiring, computer equipment, digital programmable switches, and building automation equipment hosts can be separately set up to pla
is, the length of the twisted pair wires between network devices cannot exceed 100 meters, this increases the complexity of the Structured Cabling System Design for large buildings. The following principles can be taken into consideration during design.
The first is to ensure that the cable length between systems does not exceed 100 meters. This mainly takes into account that the computer network system application can increase the allowable cable length (one level in each level, 100 metres awa
accessed by using DMA (Direct Memory Access) to directly obtain from the network. compared with NFSv4 and earlier versions of NFS to read files on the network, the performance of this method will be a thousand miles. of course, if you read files over 10 Mb/s Ethernet or 1 Gbit/s Ethernet, the difference will not be great, but you will also feel the improvements brought about by the adoption of new methods. now, if you have 10 Gbit/s Ethernet, or DDR (dual data rate) IB (InfiniBand), or a faster
addition to synchronous transmission signals, there are also asynchronous carrier-profit signals (such as ATM signals) and FDDI signals. In addition, these signals will exist in large quantities in a short period of time and are the key transmission modes of some applications. Therefore, if SDH is to be accepted by everyone, it must provide good compatibility. Otherwise, it is difficult to be adopted on a large scale.
The SDH Transmission Mechanism p
media and transmission speed can be divided into Ethernet switches, Fast Ethernet switches, Gigabit Ethernet switches, FDDI switches, ATM switches, and wildcard ring switches. Large-scale applications can be divided into enterprise-level switches, department-level switches, and working group switches. Generally, enterprise-level switches are rack-mounted, and department-level switches can have fewer rack-mounted slots) or fixed configurations, the wo
LAN switches have evolved from a HUB-based LAN shared in the traditional sense to a broader space. Take Cisco's Catalyst 5000 Series LAN switch as an example. It includes an integrated switching hardware structure, 10-Mbps Ethernet that supports switching, and-Mbps Fast Ethernet, supports fast Ethernet, FDDI, exchange-type ring, and layer-3 switching processing. This type of switch can provide exchange access to workstations, servers, network segments
Cisco Catalyst Switch configuration and maintenance method. Today's Catalyst Switch topic discusses the introduction of the History st6000 series and the introduction of the Catalyst Switch 5000 Series. There is no difficulty. Hurry into the Wireless World.
LAN switches have evolved from a HUB-based LAN shared in the traditional sense to a broader space. Take Cisco's ipvst5000 series LAN switch as an example. It includes an integrated switching hardware structure, 10-Mbps Ethernet that supports
media and transmission speed, LAN switches can be divided into Ethernet switches, Fast Ethernet switches, Gigabit Ethernet switches, FDDI switches, ATM switches, and wildcard ring switches, these switches are applicable to Ethernet, fast Ethernet, FDDI, ATM, and ring-based network.
According to the most common classification method, LAN switches can be divided into Desktop switches, Workgroup switches, and
media and transmission speed can be divided into Ethernet switches, Fast Ethernet switches, Gigabit Ethernet switches, FDDI switches, ATM switches, and wildcard ring switches. Large-scale applications can be divided into enterprise-level switches, department-level switches, and working group switches. Generally, enterprise-level switches are rack-mounted, and department-level switches can have fewer rack-mounted slots) or fixed configurations, the wo
same time. Typically, such a Console line and the corresponding DB-9 or DB-25 adapter will be randomly presented in the switch box.
5. FDDI Interface
In the early Mbps era, there was also an FDDI network type. Its Chinese name was "Fiber Distributed Data Interface", and obviously its transmission media was also optical fiber, its interface type is mainly SC type. At present, because of its inconspicuous
Common configuration commands for LAN switch MaintenanceFor the following information about LAN switch maintenance, please explain the Common commands in a blank space. LAN switches have evolved from a HUB-based LAN shared in the traditional sense to a broader space. The wide st5000 series local area developed by CiscoWww.2cto.comNetwork switch as an example, it includes an integrated switching hardware structure, supports 10-Mbps Ethernet Switching and 3rd-Mbps Fast Ethernet, can pass through t
station table, the establishment and maintenance of the station table automatically by the switch . The difference between a junction switch and an Ethernet switch is two points: one is that the node switch works on the WAN, and the Ethernet switch works on the LAN. Second, the function is different, the node switch is used to store the forwarding data packet, built-in forwarding, implementation of routing protocol, is the node in the network topology ; The Ethernet switch is used to connect th
OSI (open System Interconnection), open Systems Interconnect Reference Model. From bottom to top seven-tier model features and their representative protocols:
Physical Layer (physical) : Specifies the mechanical, electrical, functional, and process characteristics that activate, maintain, and close communication endpoints. This layer provides a physical medium for the upper level protocol to transmit data. bit, bit. Typical protocol representatives: eia/tia-232, eia/tia-499, v.35, v.24, RJ45
.
Ethernet: The range and speed of Ethernet are limited, which cannot fully meet the requirements of real-time multimedia communication and multimedia type conversion. However, the transmission Effect of static multimedia is acceptable. However, Ethernet does not support QoS, which is a defect for multimedia communication.
Group Exchange Network:
FDDI: advantage: FDDI is a high-speed LAN that provides conne
MS 150 MS 202.97.9.97 761 MS 761 MS 752 MS border7-serial3-0-0.Sacramento.cw.net [204.70.122.69]8 751 MS 751 MS * core2-fddi-0.Sacramento.cw.net [204.70.164.49]9 762 MS 771 MS 751 MS border8-fddi-0.Sacramento.cw.net [204.70.164.67]10 721 MS * 741 MS globalcenter.Sacramento.cw.net [204.70.123.6]11*761 MS 751 MS pos4-2-155M.cr2.SNV.globalcenter.net [206.132.150.237]12 771 MS * 771 MS pos1-0-2488M.hr8.SNV.glo
name qbw type ethernet mtu 1500 said 100888 state active
Set vlan 1002 name fddi-default type fddi mtu 1500 said 101002 state active
Set vlan 1004 name fddinet-default type fddinet mtu 1500 said 101004 state active bridge 0x0 stp ieee
Set vlan 1005 name trnet-default type trbrf mtu 1500 said 101005 state active bridge 0x0 stp IBM
Set vlan 1003 name token-ring-default type trcrf mtu 1500 said 101003 state a
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