5 Written Questions

1. LAN Emulation used to run normal networking over ATM, it emulates the broadcast nature of a LAN over connection oriented ATM.
2. VPN(Virtual Private Network )... these are bascially the logical networks on the physical line... you can have many VPN oveer same line.. Need of VPN arises when your company need to increase the network but don't want to buy any more switches.. take an eg. your dept. your room is packed with employees and ur company need to add 4 more persons to ur deptt. what will they do.. the solution is to create VPN's...you can configure the switch ports in other deptts. and create a specific VLAN of ur deptt.so that the persons can sit there and access to the required pcs.
3. cat 5 UTP or Fibre Optic
4. t segments a LAN into separate collision domains, but not broadcast domains. - performance monitoring is difficult, as a monitoring agent is required in each segment, or on the switch, but must be capable of monitoring each segment individually. In practice, the overhead required in the switch to provide all 9 groups of RMON is prohibitive, so manufacturers offer a subset of RMON groups only. The other means of obtaining full RMON information is to have a dedicated probe, and use "port steering" or "port mirroring" to obtain data for each port. - incorrect deployment of a switch can lead to response time problems (eg. if switches are put in the place of hubs in a collapsed backbone topology).
5. Virtual LAN is used on large LANs to break up the network into smaller Broadcast Domains. This creates communities of interest. These comunities can be based around organisational structures or

5 Matching Questions

1. What is the difference between layer 2 and layer 3 in the OSI model?
2. Dial on demand
3. What IP protocol does DLSW use?
4. What is BGP?
5. What is VLSM?

1. a Variable Length Subnet Mask, used to allocate the amount of address space required by the end network.
2. b Dial on demand is a "technology" which only activates network connection when "interesting" packets are to be sent across the infrastructure.
3. c TCP. Connection oriented and reliable.
4. d Border Gateway Protocol. Currently version 4. BGP is used for routing between networks on the Internet core, it supports many advanced routing features.
5. e Layer 2 is responsible for switching data whereas Layer 3 is responsible for routing the data. Layer3: With information gathered from user, Internet protocol make one IP packet with source IP and Destination IP and other relevant information. It can then route packet through router to the destination. Layer2: Soon after it receives IP packet from layer 3, it encapsulate it with frame header (ATM header in case of ATM technology) and send it out for switching. In case of ethernet it will send data to MAC address there by it can reach to exact destination.

5 Multiple Choice Questions

1. MAC is a machines Physical address, The internet is addressed based on a logical addressing approach. Say,when the packet reaches say the bridge connection a LAN, the question is..how does it identify, which computer it needs to send the packet to. For this it uses the concept of ARP, Address Resolution Protocol, which it uses over time to build up a table mapping from the Logical addresses to the Physical addresses. Each computer is identified using its MAC/Physical address ( u can use the ipconfig -all option to get ur MAC address).
   1. What is CIDR?
   2. What is a VPN?
   3. What is a MAC address?
   4. What is a Class D IP address
2. What IP port number does DLSW use? It uses a series of port numbers to allow priotisation. The primary port is 2065. Others are: high 2065 medium 1981 normal 1982 low 1983
   1. What IP port number does DLSW use?
   2. What is a MAC address?
   3. What IP protocol does DLSW use?
   4. What is a Broadcast Storm
3. TCP is a connection oriented protocol, which means that everytime a packet is sent say from host A to B, we will get an acknowledgement. Whereas UDP on the other hand, is a connection less protocol.
   1. What is a Class D IP address
   2. What does the Ether type code do?
   3. What is a default gateway?
   4. What is the difference between TCP and UDP
4. Network slow problem create by many reasions like.. Spyware, Virus, Spool Virus, NetBios, or may be any machine infected with a Virus or Worm.. the above is solutin may be coreect but another cause to daely is that if there is nay cycle b/w n/w then user called the dealy for this at present we switch off and then on the switch so that cycle and break and afte that we serach the reason of loop and then we will solve the problem virous and strom efeect on;y your system pefrommance not the n/w performance
   1. users are complaining of a dely while using the network what do you do?
   2. What does the Ether type code do?
   3. How many bytes in an IPX network address?
   4. What is LANE? and why is it necessary?
5. 224.0.0.0
   1. What is a Broadcast Storm
   2. What addresses do multicast start with?
   3. What is multicasting?
   4. What is a default gateway?

5 True/False Questions

1. When I ping an IP address the result comes out succesfull, but when I ping with host name no result comes, ping fails. why? → Because the denied permission had been assigned to ping command (HOST NAME). Check the Firewall( windows and firewall software)

   True        False

2. Define an autonomous system? → An autonomous system is a community of interest. Used in conjuction with routing protocols it breaks up parts of the network into manageable chunks.

   True        False

3. What is MTU → Border Gateway Protocol. Currently version 4. BGP is used for routing between networks on the Internet core, it supports many advanced routing features.

   True        False

4. How many bytes in an IPX network address? → An IPX address is made up of 4 bytes of Network address and 6 bytes of node address and takes the form of ABABABAB.FFFF.FFFF.FFFF. The address is in hexidecimal. The network address is allocated by the network (usually the servers or routers) and the node address is the MAC address of the device.

   True        False

5. What is a default gateway? → MAC is a machines Physical address, The internet is addressed based on a logical addressing approach. Say,when the packet reaches say the bridge connection a LAN, the question is..how does it identify, which computer it needs to send the packet to. For this it uses the concept of ARP, Address Resolution Protocol, which it uses over time to build up a table mapping from the Logical addresses to the Physical addresses. Each computer is identified using its MAC/Physical address ( u can use the ipconfig -all option to get ur MAC address).

   True        False