Comp Sci Midterm Practice 1
What describes the basic idea of fault tolerance?
If part of the system fails, the operation continues without interruption.
What is the primary reason that routing on the Internet is redundant?
Networks are still available in case of a path or router failure.
Desktop computers, laptops, tablets, smartphones, and other devices are made by different companies, yet they are all able to access the internet. This has led to widespread use of the internet from many different kinds of devices. What makes this possible?
Open standards and protocols.
What is true about the networks that make up the Internet?
Different types of networks can be connected in order to transfer data and communicate, and all devices that are connected on a network use the same protocol.
What is the most useful reason for the Domain Name System?
Domain names are easier for humans to remember than the IP addresses of frequently visited websites.
The term protocol is used quite a bit when referring to computer networks. What is the best definition of protocol?
A protocol refers to the defined rules that allow two connection points to talk to each other.
HTTP is an acronym for Hypertext Transfer Protocol. Of the following, which is the best definition of HTTP?
HTTP is the protocol for communicating with web servers and transferring web pages and other data back to a browser.
Each packet being routed around the internet contains header information about the packet itself, and it also contains part of the file being transferred. Imagine that you are sending an image of a basketball player from computer A to computer B across the internet. What information would be contained in each packet's header?
The IP address of the destination computer, and the sequence number of the packet in relation to all the other packets of the image.
The new version of the Internet Protocol, IPv6, allows for IP addresses that are 128 bits long. How many possible IP addresses are available with IPv6?
2^128
How are protocols like HTTP, SMTP, and IP created?
A worldwide group of volunteers draft, revise, and publish protocols.
The Engineering Task Force makes decisions by rough consensus, not by the majority of votes. What does this ensure about the internet?
Although the standards that govern the internet (like IP and DNS) might change, they will not be affected by a small group or party.
Provide an example of a physical device using the internet.
An IP address.
What is the first layer of the OSI (Open System Interconnection)?
The physical layer.
What is an accurate interpretation of bandwidth speed?
The rate at which data is downloaded in a set amount of time.
HTTP is an example of an open standard of the internet. What are the benefits of open standards like HTTP?
They allow devices and applications across many networks to work together and communicate, and they are always being created and revised by internet users around the world.
Why was IPv6 introduced as the new version of the Internet protocol?
With only 32 bit IP addresses, the older version could not support the large number of devices connecting to the Internet.