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 CCNA interview questions  CCNA Interview Questions
 CCDA interview questions  CCDA Interview Questions
Question
What is VLSM? how to Calculate VLSM? where it is use and 
why?
 Question Submitted By :: Kapilasdhir
I also faced this Question!!     Rank Answer Posted By  
 
  Re: What is VLSM? how to Calculate VLSM? where it is use and why?
Answer
# 1
VLSM:- Variable length subnet mask. it is used where we have
more than one network running in one internetwork. it
calculation depends on the networks.
 
Is This Answer Correct ?    8 Yes 3 No
Deepak
 
  Re: What is VLSM? how to Calculate VLSM? where it is use and why?
Answer
# 2
VLSM: Variable Length Subnet Mask. It is created many subnet
from One network. 
Adv: Improve network performance
     Avoid waste ip address

VLSM calculation depends on No of host using in single network 

Mainly it is used in point - point connection 
ex: 10.15.1.3/30
 
Is This Answer Correct ?    15 Yes 2 No
M Haja Bahurudeen
 
 
 
  Re: What is VLSM? how to Calculate VLSM? where it is use and why?
Answer
# 3
VLSM:- Variable length subnet mask.division of subnetted
network in to the smaller network.

its is used to reduced the size of routing table.

example:-200.10.90.0/27
         200.10.90.32/27
         200.10.90.64/27

thr. vlsm:-200.10.90.0/29
           200.10.90.8/29
           200.10.90.16/29
 
Is This Answer Correct ?    1 Yes 2 No
Naveen Kumar Sharma
 

 
 
 
Other CCNA Interview Questions
 
  Question Asked @ Answers
 
In order to limit the quantity of numbers that a system administrator has to enter, Cisco can use which abbreviation to indicate 0.0.0.0? A. host B. any C. all D. include  1
Which layer is responsible for providing mechanisms for multiplexing upper-layer application, session establishment, and tear down of virtual circuits? A.) Session B.) Network C.) Physical D.) Transport E.) Application F.) Presentation  1
Which statement is true regarding Administrative distance? A.) It is a metric B.) Number of hops between two routers C.) Trustworthiness of the routing information D.) RIP Administrative distance is 100  1
Identify the 3 guidelines for routers in the same autonomous system? A.) Must be configured for IGRP or RIP B.) Interconnected C.) Assigned the same autonomous system number D.) Configured for the same routing protocol E.) Must be same model of router  1
When discussing static routes, what is the gateway parameter used for? A.) Determining the dynamic route B.) Defining the subnet C.) Defining the Administrative Distance D.) Determining the next hop  1
What is the IP extended access list range? A.) 1000-1099 B.) 100-199 C.) 1-99 D.) 101-200  2
Which protocol carries messages such as destination Unreachable, Time Exceeded, Parameter Problem, Source Quench, Redirect, Echo, Echo Reply, Timestamp, Information Request, Information Reply, Address Request, and Address Reply? A. ICMP B. UDP C. TCP D. TFTP E. FTP  1
From Enable mode, a user types the letter 'C' and presses enter. There is more than 1 command that starts with 'C'. What message would the router return? A.) Nothing would be returned, the command is simply ignored. B.) unknown command C.) ambiguous command. D.) Copy to? E.) Configured console from console.  1
Novell NetWare has an Ethernet frame type called Ethernet_802.2. What is the matching Cisco command line keyword for this encapsulation method? A.) gns B.) arpa C.) snap D.) sap E.) novell-ether F.) dix  1
Identify 3 characteristics of IP RIP? A.) Distance vector B.) Administrative distance is 120 C.) Periodic updates every 60 seconds D.) Uses a composite metric E.) Can load balance  1
Of the following switching types, which one has the highest latency? A.) Cut-through B.) None C.) Store-and-forward D.) Fragment Free  1
What is proxy-ARP and how it is used and configured  1
NetWare IPX addressing uses a network number and a node number. Which statements are true? A. The network address is administratively assigned and can be up to 16 hexadecimal digits long. B. The node address is always administratively assigned. C. The node address is usually the MAC address. D. If the MAC address is used as the node address, then IPX eliminates the use of ARP.  1
Identify the command that forces the router to load into ROM mode upon a reload? A.) boot system rom B.) rom boot C.) boot system flash rom D.) boot router rom  1
Which OSI layer provides mechanical, electrical, procedural for activating, maintaining physical link? A.) Presentation B.) Network C.) Application D.) Physical E.) Transport F.) Data-Link  1
What key do you use to view the last command? A.) Ctrl+X B.) Ctrl+Z C.) Ctrl+E D.) Ctrl+P  1
Which OSI layer incorporates the MAC address and the LLC? A.) Data link B.) Network C.) Physcial D.) Transport  2
'Show cdp neighbors detail' show the following 3 pieces of information? A.) Hardware platform B.) Software version C.) Same as 'show version' command D.) Up to 1 address for each protocol E.) Non-direct connected routers  1
What must be true for two Routers running IGRP to communicate their routes? A.) Same autonomous system number B.) Connected using Ethernet only C.) Use composite metric D)Configured for PPP  1
CSMA/CD stand for which of the following? A.) Carrier Sense, Multiple Access with Collision Detection B.) Collision Sense, Multiple Access with Collision Detection C.) Collision Sense, Multiple Access with Carrier Detection D.) Carrier Sense, MAC address with Collision Detection  1
 
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