【文章內(nèi)容簡介】 backup directory on the local drive Restore Back up Restore If the original database is unable to load, the DHCP service automatically restores from the backup directory on the local drive administrator moves a copy of the backed up DHCP database to an offline storage location In the event that the server hardware fails, administrator can restore only from the offline storage location DHCP數(shù)據(jù)庫的備份和還原 ? 自動備份 系統(tǒng)自動進行的同步備份 ,并不需要用戶的參與 ,默認 備份間隔為 60分鐘 ? 手工備份 使用 DHCP控制臺備份和使用備份程() 或其他備份軟件的備份 DHCP數(shù)據(jù)庫的備份和還原 限制 DHCP管理員數(shù)目 To restrict who can administer the DHCP service: Restrict the membership of the DHCP Administrators group to the minimum number of users necessary to administer the service If there are users who need readonly access to the DHCP console, then add them to the DHCP Users group instead of the DHCP Administrators group DHCP Users group Have readonly DHCP console access to the server DHCP Administrators group Can view and modify any data about the DHCP server Module 2:解析 NetBIOS名稱 概述 1. NetBIOS名稱介紹 2. WINS 概述 3. 配置 WINS服務器和客戶端 4. 配置對非 WINS客戶機的支持 5. 啟用 WINS數(shù)據(jù)庫的復制功能 6. 維護 WINS服務器數(shù)據(jù)庫 NETBIOS名稱 ? NETBIOS 名稱是一個 16字節(jié)長度的地址，前 15字節(jié)表示計算機名，可以由用戶定義，第 16字節(jié)比較服務資源類型 ? NETBIOS名稱在其網(wǎng)絡中必須是唯一的 ? NETBIOS 名稱在操作系統(tǒng)的安裝過程中創(chuàng)建 ? 當啟動計算機之后，多個服務會注冊一個基于計算機名稱的唯一的 Netbios名稱 ? NETBIOS名稱注冊 ?本地廣播 ?名稱服務器 (WINS) ? NETBIOS名稱發(fā)現(xiàn) ?本地廣播 ?名稱服務器 (WINS) ? NETBIOS名稱釋放 NETBIOS名稱 NETBIOS名稱 Nbtstat工具 NBTSTAT [ [a RemoteName] [A IP address] [c] [n] [r] [R] [RR] [s] [S] [interval] ] a remotename：顯示遠程計算機的 NETBIOS名稱表 A ipaddress：顯示遠程計算機的 Netbios名稱表 c:顯示 NETBIOS名稱緩存內(nèi)容， NETBIOS名稱表及其解析的各個地址 n:顯示本地計算機的 NETBIOS名稱表 R:清除 NETBIOS名稱緩存的內(nèi)容 RR:釋放并刷新通過 WINS服務器注冊的本地計算機的NETBIOS名稱 NetBIOS 名稱解析過程 NetBIOS name resolution is the process of mapping a NetBIOS name to an IP address What is the IP address for Salesputer2? Salesputer2 1 3 Salesputer2 NetBIOS Name Cache WINS Broadcast Lmhosts File 2 NetBIOS名稱解析 ? NetBIOS 名稱解析標準方法包括 NetBIOS 名稱緩存 –使用 Nbtstat –c查看高速緩存的內(nèi)容 NetBIOS 名稱服務器 –處理來自 WINS客戶機的注冊請求 –響應 NetBIOS名稱查詢 本地廣播 4. lmhosts文件 Resolved host names from the WINS server Computer1 NetBIOS 名稱緩存 Lmhosts File Resolved host names from broadcasts A NetBIOS name cache is a location in memory that stores NetBIOS names that have recently been resolved to IP addresses whether through a WINS server, broadcast, or Lmhosts file Broadcast 如何查看和清除緩存內(nèi)容 Your instructor will demonstrate how to: 查看本地計算機緩存 nbtstat c 清除緩存并重新載入本地 lmhosts文件中帶有 PRE 標簽的項目 nbtstat R Broadcasts Broadcast Router NetBIOS Redirector The NetBIOS redirector sends out a local broadcast 1 If the resource is on the local work, the broadcast is answered and an IP address is returned 2 If the resource is on a remote work, then the broadcast will not pass through the router 3 Local broadcasts are work messages, sent from a single puter, that are distributed to all other devices on the same segment of the work as the sending puter Broadcast is answered Broadcast Fails 1 2 3 Lmhosts File An Lmhosts file is a local text file that maps NetBIOS names to IP addresses for hosts that are not located on the local sub Computer1 Lmhosts File Copyright (c) 19931999 Microsoft Corp. This is a sample LMHOSTS file used by the Microsoft TCP/IP for Windows. This file contains the mappings of IP addresses to puternames (NetBIOS) names. Each entry should be kept on an individual line. The IP address should be placed in the first column followed by the corresponding putername. The address and the putername should be separated by at least one space or tab. The character is generally used to denote the start of a ment (see the exceptions below). The following example illustrates all of these extensions: rhino PRE DOM:working group39。s DC appname \0x14 special app server popular PRE source server localsrv PRE needed for the include BEGIN_ALTERNATE INCLUDE \\localsrv\public\lmhosts INCLUDE \\rhino\public\lmhosts END_ALTERNATE WINS作用簡介 ? WINS名字服務是以點對點的方式直接通信，可以跨越路由器訪問其它子網(wǎng)的計算機。 ? WINS名字服務是動態(tài)名字服務，無須手工更改。 ? WINS名字服務不僅能夠用于 NetBIOS名字查 詢，而且還可以輔助域名主機名的查詢，以 結(jié)合 DNS和 WINS服務器的好處進行 Inter域 名查詢，因此 WINS又被稱為 Windows 網(wǎng)際名 稱服務 NetBIOS節(jié)點類型 Node type Description Registry value Bnode 利用廣播的辦法進行名稱注冊和解析 1 Pnode 利用某個 NetBIOS 名稱服務器如 WINs 解析 NetBIOS名稱。 Pnode直接查詢名稱 服務器，所以可以跨越路由器 2 Mnode 聯(lián)合使用 Bn