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Notes on TCP/IP
DHCP: know that each subnet needs one scope, client reservation needs Ip-address and MAC-address DHCP provides his clients via broadcast, which normally cannot pass a router. A router with DHCP relay agent lets them pass or you install a DHCP relay agent on a server in the subnet without DHCP server. He captures the broadcast queries and forwards them to the DHCP server. Therefore it needs of course the IP-address of the DHCP-server. 2 DHCP servers cannot replicate (WINS can!), therefore, for providing backups, you need to divert the range of IP-addresses to the 2 servers. Exclude IP-addresses assigned to i.e. Unix servers from the IP-range. SNMP: a agent software is installed on a PC and sends informations to a management system. These 2 need to be on the same community. NT only offers agent software. You can secure the agent by giving it the IP-address (or IPX or NETBEUI name) and community name of only those servers which can ask the agent software.WINS: WIns is needed if you want to browse your network over routers. Attention: Wins packets are directed packets and therefore can pass routers. A Wins proxy agent is only needed, if you have not-wins-enabled clients in your network. BROWSING: Browsing is different from name resolution!!!!! Browsing means that you can see the shares offered by servers on different subnets. This can be reached by WINS or by editing the LMHOSTS file. It must contain all PDCs of every subnet. BDCs recommended. It is needed on every client to browse servers on other subnets and to log on if the PDC goes down. (to find the BDC). Also the BDCs and PDCs need entries to find each other for replication. DNS: Know the cname and MX entries. cache.dns is used for connecting to the worldwide internet. A cacheonly server is used, when you have slow WAN-links, because zone transfer always transferres the whole database. Know ABSOLUTELY the difference between Netbios name resolution and hostname resolution, and when is which used. The mosts questions were on name resolution. Know that even in Windows NT Explorer, when you want to connect to a server, who's name is longer than 15 chars (i.e. mycomp.alldata.com), NT switches automatically to DNS/hosts resolution, because WINS max namelength is 15 chars. Know the syntax in LMHOSTS and HOSTS files and where they reside. Know the utilities, but without switches.
TCP/IP commands and utilities
The following commands are provided for connecting to other TCP/IP-based hosts:
Only FTP is provided as a server service; the rest only provide clients to access the services on other servers.
The following utilities are provided with Microsoft TCP/IP for troubleshooting TCP/IP problems:
NetBIOS and Host name resolution
When using NetBIOS and TCP/IP host names to refer to computers, the corresponding IP address must be found. This is name resolution.
NetBIOS names resolution
The following methods are available (in order used) to Microsoft TCP/IP for resolving NetBIOS host names:
Host name resolution
The following methods are available (in order used) to Microsoft TCP/IP for resolving host names: