Review of Basic Questions Chapter 9 Essay

But how does it work? The internet, based on the concept of “packet switching”, involves the travelling of small packets of data over one or more networks (Frenzel, 2013). This can be compared to “electronic postcards”, meaning that “a computer generates a piece of data and flings it into the net, just like the postal system, except 100 million times faster” (Cerf, 2013). This concept allows one computer to speak to many different computers around the network by sending out these “electronic postcards”. However, before these networks can work seamlessly together, they must use a common protocol, or set of rules for transmitting and receiving these packets of data. There are several protocols currently in use, including the OSI Model, the TCP/IP Model, UDP, HTTP, and FDP (Mitchell, 2014), but the most commonly used is Transmission Control Protocol/Internet Protocol (TCP/IP) (Gilmer, 2011). Even as early as 1977, TCP/IP was being used by other networks to link to ARPANET (Kozierok,

2. What is the difference between a WAN and a LAN? Which type of network is the Internet? Which type of network is the classroom network?

TLS (Transport Layer Security) is the successor to another security protocol; SSL (Secure Sockets Layer) which was originally developed by ‘Netscape’ (HowStuffWorks "SSL and TLS". 2014). It is a cryptographic security protocol which was designed primarily to ensure communication security across the internet. Communication security is achieved by the use of X.509 certificates and hence asymmetric cryptography which allows the exchange of a symmetric key, which can then be used to encrypt the data that is being transmitted between both parties involved in the communication. The protocol is made up of two main layers; TLS Record Protocol and TLS Handshake Protocol. TLS will be most commonly recognised when ‘https’ is noticed in

2. Enterprise networks typically use LAN _____ at each site to connect devices using some type of media.

The mail server is like an computerized mail man that capable to delievers or handles e-mails across a internet or network. It can deliver e-mails from client computer to other mail servers or client computers. The client computer are the computer that you use to read or send mails across the networks. The example would be your computer at school or home. Furthermore, Smartphone or other mobile devices that have e-mail capbilities also can categorize as a client computers. The mail server uses Simple Mail Transfer Protocol(SMTP) for mail server to send email. SMTP is an application protocol that uses to store and forward emails. It will transfer your emails across the network and mail server will uses Post Office Protocol Version 3 (POP3) or Internet Message Access Protcol Version 4(IMAP) to receive the emails at the reciving ends.

DNS stands for ‘Domain Name System’. It is an internet service that works like a

The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, hypermedia information systems.[1] HTTP is the foundation of data communication for the World Wide Web.

You will discover different network topologies and different types of networks: LANs, WANs, and internetworks (internets). The concept of switching is discussed to show how small networks can be combined to create larger ones. You will learn about the Internet: its early history, the birth of the Internet, and the issues related to the Internet today. This module covers standards and standards organizations.

Server: This is a computer that is designed to carry out specific functions at the request of other computers they’re connected to a network and direct the information stored on the network to clients, for example a web server will run software that receives requests from clients and then processes the request and delivers an output using HTML.

1. The process of obtaining an IP address for a computer name (for example, “Computer A”) is called __________. Name Resolution

When dealing with emails, you have a IMAP, a POP3 or a SMTP, protocols. First, we have a IMAP, which is similar to a POP3 because they are both used to read mails from a remote server. The IMAP is considered more advanced than a POP3. Then you have a SMTP, which is only used for sending emails. For example, if you plan to set up an email server such as hMailServer, you must know what each protocol is used for. Each protocol is considered to be a specific set of communication rules between computers. Now, we will take a closer look at each protocol specifically.

4. Identify the network protocols that are used in the protocols that are in the local are network at your shall or workplace. Why were these protocols chosen for your network? Was IPX ever implemented in your local area network? Why? if your network is using IP, what address class(es) is being used? Why? see if you can find out if and how class D and class E addresses are used in your network.

Network protocol communications, network connections established by host computer, network routing information, information about computers

Static IP address is an IP address that is permanent to a specific host for a certain amount of time. This IP address is assigned by the ISP out of a specific designated block of IP addresses and manually entered into the computer. While primarily IP addresses are sent to the host by the DHCP now, certain people prefer static IP.

When connecting your internal network to the internet the need route the packets between the two networks happens inside a router. This translation between the two different networks is known as network address translation (NAT). There are advantages when using NAT as well as disadvantages to the end user, network administrators and overall functionality of the network. We also have to understand the differences between IPv4, IPv6, and the need for NAT in each as they are different protocols and will operate differently ("Network Address Translation," 2015).