Ch. 11 Perspectives On IPv4 Subnetting Flashcards
PPDIOO
Prepare, plan, design, implement, operate, and optimize
Subdivided network
Subnet
Addresses in the same subnet are not separated by a _____
Router
Addresses in different subnets are separated by at least one _____
Router
PVC
Permanent virtual circuits
You should use one subnet for every:
VLAN, point to point serial link, Ethernet emulation WAN link (EoMLPS), frame relay PVC
Every device that connects to a subnet needs a ___ addresss
IP address
A subnets size, or length, is simply the number of usable ____ addresses in the subnet.
IP
The subnet _____ defines the size of the subnet among other things
Mask
The subnet mask sets aside a number of ____ _____ whose purpose is to number different host IP addresses in that subnet
Host bits
You can number 2^H things with H____
Bits
A subnet’s size is 2^H - 2 (where H is the number of host bits) because each subnet reserves the numerically _____ and _____ values
Lowest and highest
The subnet reserves the lowest numerical value for the subnet ______
Number
The subnet reserves the numerically highest value as the subnet ______ ______
Broadcast address
The term subnet number, subnet ID, and subnet address all refer to the number that represents or identifies a ______
Subnet
To choose to use a single size subnet in an enterprise network, you must use the same ____ for all subnets, because it defines the size of the subnet
Mask
One requirement when choosing a subnet _____ is this: that one choice must provide enough host IP addresses to support the largest subnet
Mask
The number of ____ ____ (H) defined by the mask must be large enough so that 2^H - 2 is larger than (or equal to) the number of host IP addresses required in the largest subnet
Host bits
The biggest disadvantage for using a single size subnet is that it wastes ____ addresses
IP
All subnets will be based on the formula _____
2^H - 2
VLSM
Variable length subnet masks
The original design of the internet require any company that connected to the internet had to use a ____ ___ IP network
Registered public
____ IP networks ensure that all the companies that connect to the internet all use unique IP addresses
Public
NAT
Network address translation
____ allows multiple companies to use the exact same private IP network
NAT (network address translation)
____ IP networks will never be assigned to an organization as a public IP network
Private
____ can be used by organizations that will use NAT when sending packets into the internet
Private
_____ IP networks can be used by organizations that never need to send packets into the internet
Private
Before an engineer divides a classful network into smaller networks, the network is a single group of addresses, breaking them down into smaller groups is converting them into ____
Subnets
The size of an ______ Class A, B, or C network is as follows:
Class A: 2^24 - 2 = 16,777,214
Class B: 2^16 - 2 = 65,534
Class C: 2^8 - 2 = 254
Unsubnetted
An engineer cannot change the size of a network part or the size of the entire address which is ____ bits
32
The number of _____ bits must be large enough to uniquely number all the subnets.
Subnet
The subnet mask is a ____ bit binary number
32
A ____ consists of a group of consecutive numbers
Subnet
Subnet ____ also called the subnet ID or subnet address, this number identifies the subnet. It is the numerically smallest number in the subnet. It cannot be used as an IP address by a host
Number
Subnet ____ also called the subnet broadcast address or directed broadcast address, this is the last number (numerically highest) number in the subnet. It also cannot be used as an IP address
Broadcast
____ addresses is all the numbers between the subnet ID and the subnet broadcast that can be used as an host IP addresses
IP
Devices receive their IP address and mask assignment in one of two ways, dynamically by using _____ or statically trough configuration
DHCP
Host A is a pc connected to switch S1 and assigned to VLAN 1. Which of the following are typically assigned an IP address in the same subnet as host A (select two)
The local router’s WAN interface
Th local router’s LAN interface
All other hosts attached to the same switch
Other hosts attached to the same switch and also in VLAN 1
The local router’s LAN interface
Other hosts attached to the same switch and also in VLAN 1
What is the formula for the number of hosts per subnet (2^H-2) require the subtraction of two host
To reserve two addresses for redundant default gateways
To reserve the two addresses required DHCP operation
To reserve addresses for the subnet ID and default gateway
To reserve addresses for the subnet broadcast address and a subnet ID
Reserve addresses for the subnet broadcast address and subnet ID
A class B network needs to be submitted such that it supports 100 subnets and 100 hosts per subnet. Which of the following answers lists a workable combination for the number of network, subnet, and host bits? (Select two answers) N = 16 S = 7 Host = 7 N = 16 S = 8 Host = 8 N = 16 S = 9 Host = 7 N = 8 S = 7 Host = 17
N = 16 S = 8 Host = 8 N = 16 S = 9 Host = 7
Which of the following are private IP networks (select two answers)
- 31.0.0
- 32.0.0
- 168.255.0
- 1.168.0
- 0.0.0
- 31.0.0
192. 168.255.0
Which of the following are public IP networks (select three answers)
- 0.0.0
- 30.0.0
- 168.255.0
- 1.168.0
- 0.0.0
- 0.0.0
- 168.255.0
- 0.0.0
Before class B network 172.16.0.0 is subnetted by a network engineer, the parts of the structure of the IP addresses in this network already exist, with a specific size? (Select two answers) Network Subnet Host Broadcast
Network
Host
A network engineer spends time thinking about the entire class B network 172.16.0.0, and how to subnet that network. Then chooses how to subnet this class B network and create an address and it's subnetting plan, on paper, to show his choices. If you compare his thoughts about this network before subnetting the network, to his thoughts about this network after mentally subnetting the network, which of the following occurred to the part of the structure of addresses in this network: The subnet part got smaller The host part got smaller The network park got smaller The Host part was removed The Network part was removed
The host part got smaller
Which of the following terms are not used to reference the one number in each subnet used to uniquely identify the subnet (choose two answers) Subnet ID Subnet number Subnet broadcast Subnet name Subnet address
Subnet broadcast
Subnet name
