Switched Multimegabit Data Service

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Switched Multimegabit Data Service (SMDS) - public high-speed packet service. Like Frame Relay, it is designed to connect LANs to a wide area network. The biggest difference with FR is the much faster SMDS service - up to 34 Mbit / s.

SMDS is a connectionless service. Each packet contains all the address information needed to identify the sender and the recipient. SMDS makes it possible for network access to be reserved for a single user. Addresses can be selected and communication limited to selected users. SMDS offers a level of security typical of a private network.

There are four key types of services within SMDS:

The transmission speeds in the standard classes are 4,10,16,25 and 34 Mbit / s. This allows you to connect 10 Mbit / s Ethernet LAN and a 16 Mbit / s LAN token ring network. Bibliography

Mark Norris - Teleinformatyka Wyd. WKŁ 2002

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