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Packet Switching Networks Packet Switching - Packets are relayed across network along the best route available.
Repeater = Physical layer - takes a weak signal and regenerates it - doesn't translate or filter anything - can move packets from on physical media to another (i.e. can connect thinet to fiber-optic) - they are cheap - will pass a broadcast storm
Bridge = Data Link layer - does everything a repeater does - reduce traffic by segmenting the network by using a routing table- regenerate the signal at the packet level - not suited to WANs slower than 56K - will pass broadcast storms - read the source and destination of every packet - pass packet with unknown destinations - connect dissimilar networks (i.e. Token Ring and Ethernet)
Router = Network layer - does filtering and isolating traffic - forwards particular protocols to particular addresses (other routers) - connect network segments - not all protocols are routeable (LAT and NetBEUI) - are used in complex network situations because they provide better traffic mgmt. than brides - don't pass broadcast traffic.
Brouter = combines best qualities of both a bridge and a Router - can act like a Router for one protocol and bridge all of the others (nonroutable) - delivers more cost-effective
 

 
 

 

 

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MCSE :

33. If you choose “Print Directly to the Printer” option in the Advanced tab of the Printer Properties, the spooler is bypassed. The document goes directly to the printer. This option can be used to check whether the spooler is corrupt.

34. Disk Management is used to create, manage, and delete simple volumes, spanned volumes, mirrored volumes, striped, and stripe set with parity volumes. Disk Administrator is NT 4 tool and is not available in Windows 2000.

35. By renaming ntuser.dat to ntuser.man, you can assign a mandatory profile to any specific user. To have a uniform looking desktop environment, an administrator can assign mandatory roaming user profile to multiple user accounts.

36. You can rename the Guest and Admin accounts, so that it will be difficult to guess the user name.

37.  Print Services for Unix must be installed before adding a Unix printer to a Windows 2000 computer. Further, when you add a Unix printer, it must be assigned LPR port. The Unix server that connects to the print device runs LPD. When you are installing the LPR port, you will be prompted to provide the name or IP address of the Unix computer to which print device is attached.       

38.  When you install Peer Web Services (PWS) on a Windows 2000 Professional computer, FTP, HTTP, and SMTP services get installed.    

39.  Diskperf command controls the types of counters that can be viewed using System Monitor.

-          The syntax for setting the system to start both physical and logical disk performance counters when the system is restarted is

-          diskperf  -y \\computername

-          -(none)

o        Reports whether disk performance counters are enabled on the local or specified computer and identifies the counters enabled: for physical drives, logical drives, or both.

-          -y

o        Sets the system to start both physical and logical disk performance counters when the system is restarted.

-          computername

o        Specifies the computer on which you want to see or set disk performance counter use. If a computer name is not specified, the local computer is assumed.

 

40. You can use System Monitor as well as Task Manager to monitor Processor and Memory usage on your computer.