Exam Prep 2 [Electronic resources] : Windows XP Professional نسخه متنی

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Exam Prep 2 [Electronic resources] : Windows XP Professional - نسخه متنی

Melissa Craft, Don Poulton

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  • Implementing, Managing, and Troubleshooting Network Protocols and Services


    • IP address information applied to the network interface consists of an IP address (a unique, logical 32-bit address that identifies the computer and its subnet), subnet mask (when applied to an IP address it determines what portion is the host address and what is the subnet), default gateway (the router's address that leads to the main network or public Internet), DNS server address (IP address of the DNS server where names are resolved to IP addresses), and Windows Internet Naming Service (WINS) server address (IP address of the server that provides NetBIOS name to IP address resolution).

    • Each network connection in My Network Places represents a separate adapter and separate IP address information.

    • When you choose Bridge Network Connections in Windows XP, you are creating a bridge that joins the networks of two separate adapters in a dual-homed Windows XP computer.

    • The Automatic Private Internet Protocol Addressing (APIPA) system provides an alternate configuration to DHCP for automatic IP addressing.

    • APIPA defines its IP addresses in the range of 169.254.0.1 to 169.254.255.254. The subnet mask on these addresses is configured as 255.255.0.0.

    • Table 21 describes the IP address classes, including the maximum number of networks and number of hosts per network for each class.


    Table 21. IP Address Classes

    Class

    Dotted Decimal Range

    First Octet Binary

    Usage

    Number of Networks

    Number of Hosts Per Network

    A

    1.0.0.0

    126.255.255.255

    0xxxxxxx

    Large networks/ISPs

    126

    16,777,214

    B

    128.0.0.0

    191.255.255.255

    10xxxxxx

    Large or mid-size networks/ISPs

    16,382

    65,534

    C

    192.0.0.0

    223.255.255.255

    110xxxxx

    Small networks

    2,097,150

    255

    D

    224.0.0.0

    239.255.255.255

    1110xxxx

    Multicasting

    N/A

    N/A

    E

    240.0.0.0

    254.255.255.255

    1111xxxx

    Reserved for future use

    N/A

    N/A

    Loopback

    127.0.0.1

    127.255.255.255

    01111111

    Loopback testing

    N/A

    N/A

    Private IP Class A address

    10.0.0.0

    10.255.255.255

    00001010

    Reserved for a private network

    1

    16,777,214

    Private IP Class B address

    172.16.0.0

    172.16.255.255

    10101100

    Reserved for a private network

    1

    65,534

    Private IP Class C address

    192.168.0.0

    192.168.255.255

    11000000

    Reserved for a private network

    254

    254

    • Know how to use Event Viewer, Ipconfig, Ping, Ftp, Nbtstat, Netstat, Nslookup, and tracert.

    • Point-to-Point Protocol (PPP) is a dial-up protocol that supports TCP/IP and IPX/SPX and others with advanced compression and encryption functions. Serial Line Internet Protocol (SLIP) is an older dial-up protocol originally created for Unix that supports only TCP/IP.

    • Tunneling protocols are used for virtual private networks (VPNs). They are Point-to-Point Tunneling Protocol (PPTP), which supports multiple networking protocols; and Layer 2 Tunneling Protocol (L2TP), which also supports multiple networking protocols and is used with IP Security (IPSec).

    • Table 22 describes remote access authentication protocols and their security methods.


    Table 22. Authentication Protocols for Remote Access

    Acronym

    Name

    Security

    CHAP

    Challenge Handshake Authentication Protocol

    One-way authentication. Server authenticates client.

    EAP

    Extensible Authentication Protocol

    Not used to provide its own security, enables enhanced interoperability and efficiency of authentication process.

    MS-CHAP

    Microsoft Challenge Handshake Authentication Protocol

    One-way authentication. Server authenticates client.

    MS-CHAPv2

    Microsoft Challenge Handshake Authentication Protocol version 2

    Mutual (two-way) authentication.

    PAP

    Password Authentication Protocol

    Clear-text, one-way authentication. Least secure method.

    SPAP

    Shiva Password Authentication Protocol

    Reversible encryption, one-way authentication.

    Smart cards

    Certificates

    Certificate-based, two-way authentication.

    • The most secure protocol is certificate based. The next most secure is MS-CHAPv2. The least secure is PAP.

    • Internet Connection Sharing (ICS) can be configured on a Windows XP Professional computer to share its Internet connection with other computers on its local network.

    • ICS runs a simplified DHCP service, DNS forwarder, Network Address Translation (NAT), and TCP/IP traffic forwarding.

    • Table 23 lists various commands that are used to access networked resources via a web browser.


    Table 23. Accessing Resources Via a Browser

    Command

    Sample URL

    Usage

    http://

    http://www.microsoft.com

    Download186 files from Internet web servers and displays the file within the browser.

    https://

    https://www.microsoft.com

    Uses SSL to downloa171 files so that the information exchanged is secured.

    ftp://

    ftp://ftp.microsoft.com

    Downloads a file from an FTP server.

    File://

    File://server/share/folder/file

    Opens the file specified from a network server.

    http://

    http://printserver/printers

    Displays a list of the printers that are being shared by a computer configured with IIS for sharing printers.

    http://

    http://printserver/printer

    Opens the printer page for the printer.

    http://

    http://username:password@

    www.intranet.local

    Automatically inputs a username and password to access a password-protected website.

    • Remote Assistance and Remote Desktop both use Remote Desktop Protocol (RDP).

    • To share a Remote Desktop session, you open the System applet in Control Panel, click the Remote tab and check the box next to Allow Users to Connect Remotely to This Computer. Then you must click the Add Users button to select the users allowed to connect.

    • Remote Desktop privileges are automatically granted to any member of the Administrators group.

    • Remote Assistance allows a user running a Windows XP computer on a network to request assistance online, or for an expert to offer assistance remotely. The expert's session is a shadow of the user's console.

    • To request Remote Assistance, you use Help and Support in the Start menu.

    • Remote Assistance requests can be made through Windows Messenger, email, or file.



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