Appendix E: Understanding IP and IP addressing 163

the IP address of a boot server host

the name of a file to be loaded into memory and executed

the local subnet mask

the local time offset

the addresses of default routers

the addresses of various Internet servers

The EIU supports the BOOTP relay agent functionality described in RFC951 and RFC1542.

File transfer protocol

FTP provides a robust file transfer mechanism for data transfer between IP hosts. FTP is used to transfer files between the DMS-100 file system and a server or workstation. Once a connection is established, the EIU node requests the appropriate account information (including security information) before establishing a session.

FTP is defined in RFC959.

Open shortest path first

Open shortest path first (OSPF) is a link-state-based routing protocol. It defines a preferred route, which is the shortest available path between a source and a destination. The length of a path is determined by its metric, a measure that can be adjusted by network administrators to favor one path over another.

OSPF is defined in RFC1583.

Routing information protocol

The routing information protocol (RIP) is a distance-vector routing protocol. RIP ranks paths in terms of hops. Each router in a path is a hop. For historical reasons, many applications use the term seconds in place of hops.

RIP is defined in RFC1058.

Telnet

Telnet is a virtual terminal system for IP. It allows a valid user access to a terminal or command process on a remote system.

Telnet is defined in RFC495.

DMS-100 Family EIU User Guide TELECOM12

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Cabletron Systems DMS-100 manual File transfer protocol, Open shortest path first