D-Link DWS-3227P - xStack Switch - Stackable Bedienungsanleitung PDF herunterladen (Seite 5)

Semaphore Technologies Pvt. Ltd. – (technolo[email protected]om)

the attached device has signaled that it wants to listen to that group. In a switch not

aware of multicasting and broadcasting, frames are also forwarded on all ports of

each broadcast domain, but in the case of IP multicast this causes inefficient use of

bandwidth. To work around this problem some switches implement IGMP snooping.

Layer 4

While the exact meaning of the term Layer-4 switch is vendor dependent, it almost

always starts with a capability for network address translation, but then adds some

type of load distribution based on TCP sessions.

The device may include a stateful firewall, a VPN concentrator, or be an IPSec

security gateway.

Layer 7

As with the other types of switches, Layer 7 is a marketing term. They may

distribute loads based on URL or by some installation-specific technique to recognize

application-level transactions. A Layer-7 switch may include a web cache and

participate in a content delivery network.

Types of switches

Form factor

A rack-mounted switch with network cables

• Rack mounted

• Non-rack mounted

• Chassis — with swappable "switch module" cards. e.g. Cisco's Catalyst switch

Configuration options

• Unmanaged switches — these switches have no configuration interface or

options. They are typically found in SOHO or home environments.

• Managed switches — these are ones which allow access to one or more

interfaces for the purpose of configuration or management of features such as

Spanning Tree Protocol, Port Speed, VLANs, etc. High-end or "enterprise"

switches provide a serial console and command-line access via telnet and

Ssh, as well as management via SNMP. More recent devices also provide a

web interface. Limited functions, such as a complete reset by pushing buttons

1 2 3 4 5 6 7 8 9 10 ... 25 26

Keine Kommentare

D-Link DWS-3227P - xStack Switch - Stackable Bedienungsanleitung Seite 5