In previous chapters we have learned
that TCP/IP is a complex and highly customizable protocol suite. This chapter
builds on these basic concepts, examining how TCP/IP based networks are
designed and analyzed. It begins by explaining Subnetting. Subnetting separates a network into multiple defined
segment or subnets. This might be done to achieve the following.
- Enhance security
- Improve performance
- Simply troubleshooting
An internet gateway is a combination of software and hardware
that enables two different network segments to exchange data. A gateway
facilitates communication between two different networks of subnets. A public
network is one that any user may access with little or no restrictions, whereas
private network is a network whose access is restricted to only authorized
clients.
All internet mail services operate on the same principles of
mail delivery, storage, and pick-up though they may use different types of
software to accomplish these functions. The following protocols achieve these
tasks.
- Simple Mail Transfer Protocol (SMTP)
- Multipurpose Internet Mail Extension (MIME)
- Post Office Protocol (POP)
- Internet Message Access Protocol (IMAP)
The chapter covers the following utility programs that help analyze
network traffic.
Ipconfig, Ifconfig, Nbtstat, Hostname, Host, Nslookup to name
a few.
The text expands it discussion on the various topics
mentioned in this Blog. Again the many pictures, diagrams, and charts helped in
clarifying the concept.
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