Subject: 70-58 Stumpers Netbios/WINS/WAN Connection/NWLINK/Etc.

Use the following resources:

a.. Networking Essentials (MS Press) Make sure you have version 2.

b.. MacMillian/New Riders Study Guide

c.. Transcender (don't make the mistake I first made! Use version 2.5b)

d.. Brain Dumps. The best questions I've seen is "104 multiple-choice questions" www1.tip.nl/....

e.. Research your answers! Many people give "answers" to questions that are wrong. Many people give sample questions with no correct answer in a-d!

Beyond all the stuff you'll find by surfing, here's other stuff that you will need to know that I have not found too much information on in other braindumps, however, I only looked at about 15.

NETBIOS

a.. A Netbios name is 15 characters. If you see any scenario question that says 16 or more to complete the required result, fill in the "does not complete the required results box!"

b.. This is the name that is under Network Neighborhood, Properties, Identification

c.. In order not to duplicate, be sure the domain, computer and share name are unique.

WINS

a.. Offers centralized management of the computer name database on the server

b.. Uses LMHOSTS file when WINS or broadcast name resolution fails (stored on local drive)

c.. Resolves/Maps computer (NETBIOS) names to IP Addresses

d.. If WINS server is down and there is no LMHOSTS file, the user can't connect

e.. NetBIOS broadcasts are only received by computers on the local subnet

DNS

a.. Uses HOSTS file when DNS name resolution fails (stored on local drive)

b.. Resolves/maps remote host/DNS names (microsoft.com) to an IP Address

c.. Can be used as a local DNS equivalent

d.. If you are trying to resolve a computer name with a period "." in it, DNS takes over, it figures it's a DNS name not WINS (which is why you cannot have a period in the Netbios Name).

e.. DNS names always use periods to indicate domains and subdomains

Both look on the "name server" in a centralized file first, if it doesn't find it, looks in the LMHOST or HOST file to resolve the name.

Problems

If you can ping a server with an IP address but cannot get the host/server/computer name, either:

1. The DNS server is down and there is not HOSTS file

2. The WINS server is down and there is no LMHOSTS file

3. The name is not registered with the Name Server (ie WINS or DNS)

4. The computer name is spelled incorrectly

DHCP

a.. The Dynamic Host Configuration Protocol (DHCP) automates the assignment and reassignment of IP addresses to network computers.

b.. Used for less administration

Increasing Network Performance

I've noticed that there's a few stumpers. Research this to confirm:

a.. If you are given a scenario question where there are Unix, Win95, Netware, etc computers and they want to increase networking performance by having one protocol on all computers by using NWLINK, do not fall for this trap. I would think the ideal ans

b.. Changing packet size from 1514 bytes to 576 bytes? My research states opposite. You can often improve client/server performance by reducing the number of network read and write operations per time period by increasing the network packet size.

c.. Increase TCP window from 4096 to 16384? My research indicates that adjustments to a TCP window is the best way to improve performance on a busy network by increasing the receive window size. The test does not differentiate.

Connecting NT Server to Netware

a.. NT Server: NWLINK with File and Print Services for NetWare on the Server

b.. NT Workstation: NWLINK with Client Services for NetWare on the Server

c.. Win95 Computer: IPX/SPX compatible protocol with Microsoft Client for NetWare Networks

Token Ring

a.. You notice that getting a file Ethernet to Token Ring is faster than Token Ring to Ethernet.

b.. An ethernet packet is 1515 bytes

c.. A token ring packet is 4000+ bytes

d.. The token ring packet must be broken down in order to transfer it to Ethernet, taking more time.

e.. Don't fall for the "different frame type" answer or that Token Ring is slower, it's the packet size!

Measuring Bandwidth of a New Site?

I cannot find any research on this, but Network Analyzer seems the most logical.

X.25, Frame Relay, ATM, TI Lines, etc.

Quite a few of questions

a.. ATM is fixed length and goes 100Mbps+, does voice, video and data (know this!)

b.. Frame Relay is variable length packet switching and customer determines bandwidth

c.. X.25 is reliable because it does error checking

d.. T1 is 1.54 Mbps

e.. Multiple modems on a RAS server can simply be added together (28.8+28.8+28.8+28.8)

a.. PPP does compression, uses more protocols, and automatically gives you an IP address

b.. SLIP does not do compression, you need a script file and an IP address, uses TCP/IP, OLD

Connection/Connectionless

Trick: Remember Connection-less is "Less" Reliable but fast

Last but not least you will have the following two on your test!

Two NICs, both the exact same with identical MAC addresses. Reset cards so MAC address is default. You cannot have two cards with the same MAC address.

Coax Uses RG58 A/U cable, Terminators must measure 50 Ohms,

Connectors and Cable must be infinite (not 0!)

If the terminator is not 50 ohms, replace it. If the cable is not RG58 A/U, replace it.

Donna