Eddie Mazariegos

Professor Edward Crowley

CIS 3347

TCP/IP and Subnet Masking

1. What is TCP/IP version 6?

• New TCP/IP technology that replaces version 4

2. What version of TCP/IP will we focus on?

• TCP/IP version 4.

3. What does it mean when we say that TCP/IP is actually a protocol suite?

• Made up of TCP protocol and IP protocol. It is both protocols all tied together. IP controls the routing information to different devices. TCP allows the devices to talk to each other.

4. What is a routable protocol?

• Routable protocols are used to divide networks into multiple sub networks.

5. What OSI layer does IP reside upon?

• Layer 3 – Network Layer

6. What OSI layer does TCP reside upon?

• Layer 7 – The Application Layer

7. In TCP/IP what is windowing?

• The process by which the client computer sends information to the server computer.

8. How many bits does an IP v4 address have?

• IPV4 has 4 octets, and 32 bits.

9. In TCP/IP, what is the default gateway?

• The router for the subnet work you are on. It allows your computer to look on the local

10. What does a Domain Name Server do?

• It is what turns domain names into IP addresses. Computers don’t care about the domain name, so the DNS maps domain names to IP addresses.

11. What is Network Address Translation (NAT)?

• NAT translates a public IP address to a private IP address. This allows for private address on the internal network to map to an external public IP address. This extends the number of networks that can be used in IPV4.

12. In a TCP/IP address, what is an octet?

• 8 number series that make up parts of an address. There are 8 numbers are marked left to right.

13. What is the purpose of a subnet mask?

• A way to segment a network logically when on the same physical network, the subnet mask is what tells you what part of the IP address is for the network, and what part of the address is for.

14. What would the subnet mask be if you wanted to use 8 bits for the network address and 8 bits for subnets?

• The subnet mask would be 255.255.0.0 this would be a class B subnet with 16 bits for the network.

15. When was the last time that class full addressing was commonly used?

• This was commonly used in 1993

16. What replaced class full addressing?

• CIDR (classless inter-domain routing) replaces class full addressing