# Shared Flashcard Set

## Details

CCNA 640-802 Ch.3
CCNA 640-802 Ch.3 - Subnetting, VLSM
11
Computer Networking
Professional
10/24/2012

Term
 What does IP Subnet-Zero mean?
Definition
 Allows you to use the first and last subnet in your network
Term
Definition
 Allows a recipient to distinguish between the network ID portion and the host portion of the address
Term
 What are the 5 questions to ask to subnet a network
Definition
 1. How many subents does the subnet mask produce?2. How many valid hosts per subnet are there?3. What are the valid subnets?4. What is the broadcast address of each subnet5. what are the valid hosts in each subnet?
Term
 What is the equation to figure out the number of subnets
Definition
 2^x. where x is the number of masked bits
Term
 What is the equation to figure out the number of hosts per subnet
Definition
 2^y - 2. Y is the number of unmasked bits
Term
 Wat is the equation to figure out the valid subnets?
Definition
 256 - subnet mask = block size
Term
Definition
 It is always the number right before the next subnet. For example for subnets 0, 64, 128, 192. For subnet 0 the broadcast is 63.
Term
 How do you find the number of valid hosts?
Definition
 The numbers between, not including the first one and last one.
Term
 Subnet 192.168.10.0/25
Definition
 how many subnets? 2^1=2how many hosts per subnet? 2^7-2=126What are the valid subnets? 256-128 = 0,128broadcast address: 127
Term
 Subnet 172.16.0.0/17
Definition
 How many subnets: 2^1 = 2how many hosts: 2^15 - 2 = 32,766Valid subnets: 256-128 = 0 & 128
Term
 Why does IGRP and RIP not work for VLSM
Definition