| A | B |
|---|
| How can you figure out what is the slash notation? | By counting how may bits that are turned on. |
| 2 (to the 7th)= how many usable hosts on a network? | 2 (to the 7th)= 128 - 2= 126 |
| What is the default subnet mask of a class B network? | 255.255.0.0 |
| On a class A address determine what is the Network and what is the host address. | Network.Host.Host.Host |
| What is 255.255.255.255 address? | Network Broadcast address |
| When does a Class A look like a class B in the subnet mask? | When all the bits are turned on in the second octet Example: 255.0.0.0 and you have to borrow 11 bits then it would look like 255.255.224.0 |
| rules to subnetting | the subnet bits in the IP address cannot be all 1s or all 0s, the host bits in the ipaddress canot be all 1s or all 0s |
| figures out subnet masks, valid networks, number of hosts, and host ranges | subnet calculator |
| a connection between two LANs | WAN connection |
| contiguous bits | one bit following another |
| subnet bits | bits used in the subnet mask to extend the number of bits available for the network portion of the ip address |
| In the address 62.130.28.45, which part is the network portion? | Since this is a class A address, the first octet (62) is the network part. |
| If I need 15 subnets on a class C address, what is the maximum number of hosts per subnet? | There can only be 6 hosts per subnet. |
| What is a reason to subnet? | To reduce network traffic - Make more manageable - Allow for different physical networks within the same organization. |
| In the host 128.65.33.44 with subnet mask 255.255.0.0, is 128.65.22.80 a local host? | Since this is a Class B address with no additional subnets, and the first 2 octets match, it is a local host. |
| Subnet masks bits should come from the ________ bits of the host field. | Highest-order or left-most |
| Why are there reserved IP addresses? | for local loopback and internal network use |
| In bit pattern 11111000 how many subnet bits are indicated? | 5 |
| What is a subnet mask? | A number that looks like an IP address, that shows TCP/IP how many bits are used for the network portion of an IP address. |
| What is the difference in local and remote networks? | Local is when the network (including subnet) portion of the source's IP address is exactly the same as that of the destination's IP address. Remote is when any bit of the network portions (including subnet) differ from each other. |
| What are the standard subnet masks for Class A, B, & C addresses? | A is 255.0.0.0 B is 255.255.0.0 C is 255.255.255.0 |
| In the subnetting rules, what cannot be set to all 0's or all 1's? | network bits, subnet bits and host bits in the IP address |
| What five things have to be determined in the six steps of creating a subnet mask? | how many subnets are needed - maximum number of hosts on each network - subnet mask - valid network addressess - range of valid host IP address on each subnet |
| In the rules of subnetting the subnet bits and the host bits in the IP address can not be all _______ or _________. | 1's or 0's |
| What is the default subnet mask for class A in decimal form? Explain how the default subnet masks progress for each class. | Class A default subnet mask is 255.0.0.0 - It progresses by adding another octet of 255 to the default of the class above it, eventually leaving only the last octet of 0. |
| How do you determine the maximum number of hosts on a subnet? | You count everything that is a hardware component on the network, such as printers, fax, hosts, and routers. |
| What do the 1's represent in the IP address? What does the 0's represent in the IP address? | The 1's represent the Network ID and the 0's represent the Host ID. |
| How does IP determine whether the destination address is local or remote? | If a destination address is local the network / subnet bits of both addresses have to be exactly the same. |
| A subnet mask looks similar to a(an)_______________. | IP address |
| How many bits does a standard Class B IP Address use to point to its network? | 16 |
| There are four sections in a subnet mask divided by decimals. What are they called? | octets |
| What is the first step you need to take when you decided you want a certain number of networks? | add "1" to that number |
| The first octet determines what class an IP address is, what is the range for a Class A address? | 1-127 |
| Name some benefits of subnet masking | provides extra flexibility, most efficient use of addressing |
| A subnet mask is how many bits long? | 32 |
| How many bits are used for the host address in Class C? | 8 bits |
| What is meant by borrowing in subnetting? | this is when bits are taken from the hosts' bits to make subnets |
| What type of address is it if all the host bits are 1's? | a Broadcast address |
| What part of the IP address does the subnet mask point out? | the network portion |
| What are the IP address classes available for TCP/IP hosts and what are their network portions? | Class A- Network.H.H.H - class B- Network.Network.H.H - class C- Network.Network.Network.H |
| Convert the IP address 131.107.33.0 to Binary | 10000011.01101011.00100001.00000000 |
| How do you find out your IP address and subnet mask in Windows 2000?? | go to the command prompt and type in ipconfig |
| What do you do when the number of required subnets doesn't equal a power of 2? | Use next higher power |
| Can you determine the class of an IP address from its subnet mask? | No, not unless it is one of the standard subnet masks |
| Out of each subnet, how many IP addresses are unusable? | 2 (all 0's and all 1's) |
| What is the maximum number of valid subnets for a class c address? | 62 (The most you can borrow from the last octet is 6 bits. 2^6-2=62). |
| What is Subnetting? | The process of subdividing a single class into small networks. |
| What is the main question for the Internet layer when sending packets across a network? | Is the destination address local or remote? |
| Equation to solve how many networks you can create. | (2 subscript N) - 2 N = number of subnets |
| show the significance of each bit in a subnet mask. | n = network s= subnet h= host ex. nnnnnnnn.nnnnnnnn.nnnnnnn.sshhhhhh |
| The subnet mask is used to inform the IP about | which bits represent the network number and which bits represent the host number |
| What is the purpose of our author's mythical "subnet goggles"? | Subnet goggles help you see all 32 bits of an IP address in each of their own slots, using letters to represent the type of portion each bit represents. |
