Novell OPEN ENTERPRISE SERVER 2 SP2 - ADMINISTRATION, Руководство по внедрению, Страница: 99 / 288

Network Services
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Network Services
Network services as used in this section, are associated with protocols that provide the following:
Š
Data packet transport on the network.
Š
Management of IP addresses and DNS names.
Š
Time synchronization to make sure that all network devices and eDirectory
TM
replicas and
partitions have the same time.
Š Discovery of network devices and services, such as eDirectory, printers, and so on as required
by certain applications, clients, and other services.
This section discusses the following:
Š
Section 12.1, “TCP/IP,” on page 99
Š
Section 12.2, “DNS and DHCP,” on page 99
Š
Section 12.3, “Time Services,” on page 101
Š
Section 12.4, “Discovery Services,” on page 112
Š
Section 12.5, “SLP,” on page 113
For links to more information and tasks, see the “ Network Protocols ” page in the OES 2 online
documentation.
12.1 TCP/IP
Network nodes must support a common protocol in order to exchange packets. Transport protocols
establish point-to-point connections so that nodes can send messages to each other and have the
packets arrive intact and in the correct order. The transport protocol also specifies how nodes are
identified with unique network addresses and how packets are routed to the intended receiver.
Open Enterprise Server 2 includes the standard Linux TCP/IP support on SUSE
®
Linux Enterprise
Server 10.
12.1.1 Coexistence and Migration Issues
Internetwork Packet Exchange
TM
(IPX
TM
) was the foundational protocol for NetWare from the 1980s
until the release of NetWare 5.0, when support for pure TCP/IP became standard.
To aid with migrations from NetWare to OES, coexistence between IPX and TCP/IP networks is still
supported on NetWare, but IPX is not supported on Linux.
12.2 DNS and DHCP
Domain Name Service (DNS) is the standard naming service in TCP/IP-based networks. It converts
IP addresses, such as 192.168.1.1, to human-readable domain names, such as
myserver.example.com, and it reverses the conversion process as required.
The Dynamic Host Configuration Protocol (DHCP) assigns IP addresses and configuration
parameters to hosts and network devices.