Perspectives on IPv4 Subnetting Flashcards
True or False
Addresses in the same subnet are not separated by a router.
True
True or False
Addresses in different subnets are separated by at least on router.
True
Based on the rules in the book, you should use these rules and plan for one subnet for every?
VLAN
Point-to-Point serial link
Ethernet emulation WAN link (EoMPLS)
Frame Relay PVC
_______-______ ______ ______ is the practice of using different masks for different subnets in the same classful IP network.
Variable-length subnet mask (VLSM)
What are the solutions that the Internet community came up with during the 1990s to solve the IPv4 addressing issue?
- A new version of IP (IPv6), with much larger addresses (128 bit)
- Assigning a subset of a public IP network to each company, instead of an entire public IP network, to reduce waste
- Network Address Tranlation (NAT), which allows the use of private IP networks.
In a Class A network how many bits are dedicated to the Host and Network?
Network Bits = 8
Host Bits = 24
In a Class B network how many bits are dedicated to the Host and Network?
Network Bits = 16
Host Bits = 16
In a Class C network how many bits are dedicated to the Host and Network?
Network Bits = 24
Host Bits = 8
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.
Subnet number
Also called the subnet broadcast address or directed broadcast address, this is the last (numerically highest) number in the subnet. it also cannot be used as an IP address by a host.
Subnet broadcast
All the numbers between the subnet ID and the subnet broadcast address can be used as a host IP address.
IP addresses
What is the subnet planning, design, and implementation tasks?
- Analyze Needs
- # Subnets
- # Hosts/Subnet
- 1 Size Subnet - Design Subnets
- Choose Network
- Choose 1 Mask
- List all Subnets - Plan Implementation
- Subnets–>Locations
- Static IP
- DHCP Ranges
Host a is a PC, connected to switch SW1 and assigned VLAN 1. Which of the following are typically assigned an IP address in the same subnet as host A? (Select two)
a. The local router’s WAN interface
b. The local router’ s LAN interface
c. All other hosts attached to the same switch
d. Other hosts attached to the same switch
b. The local router’ s LAN interface
d. Other hosts attached to the same switch
Why does the formula for the number of hosts per subnet (2^H - 2) require the subtraction of two hosts?
a. To reverse two addresses for redundant default gateways (routers)
b. To reverse the two addresses required for DHCP operation
c. To reverse addresses for the subnet ID and default gateway (router)
d. To reverse addresses for the subnet broadcast address and subnet ID
d. To reverse addresses for the subnet broadcast address and subnet ID
A Class B network needs to be subnetted such that it supports 100 subnets and 100 hosts/subnet. Which of the following answers list a workable combination for the number of network, subnet, and host bits? (Select two)
a. Network =16, Subnet = 7, Host = 7
b. Network =16, Subnet = 8, Host = 8
c. Network =16, Subnet = 9, Host = 7
d. Network =8, Subnet = 7, Host = 17
b. Network =16, Subnet = 8, Host = 8
c. Network =16, Subnet = 9, Host = 7