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Common Internet Exam Questions, Exams of Nursing

University of OxfordNursing

A wide range of topics related to computer networking and internet technology, including questions and answers on local and wide area networks, protocols, transmission rates, network topologies, web browsing, security measures, and internet services. A comprehensive overview of fundamental networking concepts and their practical applications, making it a valuable resource for students preparing for exams or anyone interested in understanding the technical aspects of the internet and computer communication. The questions cover a diverse range of topics, from the basics of network components and terminology to more advanced concepts like encryption, dns, and remote management software. By studying this document, students can gain a deeper understanding of the underlying principles and technologies that enable the modern internet and its various applications.

Typology: Exams

2023/2024

Available from 09/18/2024

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The Internet Common Exam Questions
Give the full name and give an example of the use of a LAN and a WAN - correct answer ✔✔Local Area
Network - Intranet
Wide Area Network - Internet / World Wide Web
What is a protocol? - correct answer ✔✔A set of rules
What is BAUD rate? - correct answer ✔✔The rate that signals/voltage changes are transmitted
What is the bit rate? - correct answer ✔✔The number of bits transmitted per second
What is the bandwidth? - correct answer ✔✔The range of frequencies a medium is capable of
transmitting
What is the relationship between bandwidth and bit rate? - correct answer ✔✔Greater bandwidth
allows greater bit rate
What is serial and parallel transmission? Give an advantage for each - correct answer ✔✔Serial
transmission is where bits are transmitted one after the other, the advantage is that is can be
transmitted over a longer distance (cabling is also cheaper and there is less chance of skew.) Parallel
transmission is where its are transmitted along several wires/channels/lines at the same time, the
advantage is that there is faster transmission.
What is asynchronous data transmission? - correct answer ✔✔Transmission of data without use of
external clock signal
Explain one purpose of a handshaking protocol - correct answer ✔✔To check that a receiving device is
connected
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The Internet Common Exam Questions

Give the full name and give an example of the use of a LAN and a WAN - correct answer ✔✔Local Area Network - Intranet Wide Area Network - Internet / World Wide Web What is a protocol? - correct answer ✔✔A set of rules What is BAUD rate? - correct answer ✔✔The rate that signals/voltage changes are transmitted What is the bit rate? - correct answer ✔✔The number of bits transmitted per second What is the bandwidth? - correct answer ✔✔The range of frequencies a medium is capable of transmitting What is the relationship between bandwidth and bit rate? - correct answer ✔✔Greater bandwidth allows greater bit rate What is serial and parallel transmission? Give an advantage for each - correct answer ✔✔Serial transmission is where bits are transmitted one after the other, the advantage is that is can be transmitted over a longer distance (cabling is also cheaper and there is less chance of skew.) Parallel transmission is where its are transmitted along several wires/channels/lines at the same time, the advantage is that there is faster transmission. What is asynchronous data transmission? - correct answer ✔✔Transmission of data without use of external clock signal Explain one purpose of a handshaking protocol - correct answer ✔✔To check that a receiving device is connected

What is latency? - correct answer ✔✔Time delay between the moment something is initiated and the moment the effect begins What are the functions of the start bit, parity bit and stop bit? - correct answer ✔✔The start bit synchronises the receiver, the parity bit performs the parity check which will identify any errors I n transmission and the stop bit allows the receiver to process received bits The BAUD rate ad the bit rate of a communication channel may be different. Explain how this can occur. - correct answer ✔✔A signal can contain one or more bits. Bit rate can be higher than baud rate because bit rate = baud rate * number of bits per signal change State one advantage (with reasoning) for both bus topology and star topology - correct answer ✔✔Bus topology - lower cost due to reduced cabling / more flexible because it is easy to add or remove stations Star topology - if one cable fails it only affects one computer because each computer is directly connected to the central computer / it is simple to isolate faults as messages are sent directly / different computers can transit at different speeds to the central computer http://www.bargainbooks-r-us.co.uk/index.htm - what is the domain name of this supplier? - correct answer ✔✔bargainbooks-r-us.co.uk http://www.bargainbooks-r-us.co.uk/index.htm - what is the index.htm? - correct answer ✔✔The file name / the page requested / the home page Sometimes when the browser is used the software displays the error message 'Page Not Found'. Give one possible reason for this, other than misspelling the URL - correct answer ✔✔The web server cannot find the page requested / the page has been deleted / the page has been moved to a different folder / the page does not exist / the page is in the process of being updated / the page is currently offline Describe two benefits of connecting all libraries to a WAN. One should be a benefit for a library administrator, and one a benefit for a borrower - correct answer ✔✔Administrator - electronic transfer of documents between libraries, email communication with the outside world, backup of data/network administration for all libraries is more manageable and done centrally Borrower - email communication with the outside world / enquiries about books available at other libraries / easier communication between the library and a borrower

http://www.aqa.org.uk/courses/computing.html - describe the 'function' of courses/computing.html - correct answer ✔✔The path name Name two similarities between an intranet and the Internet - correct answer ✔✔Both use the same protocol / both are client-server based / both have similar purpose / both are accessed through the use of a URL Why do people prefer to use a Fully Qualified Domain Name (FQDN) rather than an IP address? - correct answer ✔✔It is easier to remember a FQDN or converse for IP address What is the role of a DNS server? - correct answer ✔✔To take a required FQDN and to return an IP address Describe two situations when a DNS query will not be sent to a remote DNS server - correct answer ✔✔The local computer already ha a computer o the needed IP address / the local computer has a cache of recent DNS queries / the URL typed in already contains an IP address / the URL refers to a local resource In which layer of the TCP/IP stack does the browser operate? - correct answer ✔✔Application layer (the fourth layer) Why might a computer need to make several HTTP GET requests to display one web page? - correct answer ✔✔To fetch different parts of the be page that also include a URL to fetch a needed image What is meant by a client port number? - correct answer ✔✔Port that is temporarily assigned and automatically assigned from the TCP/IP stack What does URL stand for? - correct answer ✔✔Uniform Resource Locator Name the TCP/IP layers - correct answer ✔✔Application layer, transport layer, network layer and link layer

Describe, for a packet, the role of the two lower levels of the TCP/IP stack in the router - correct answer ✔✔The link layer responsible for network drivers and the network layer looks at the destination IP address What is encryption? - correct answer ✔✔Transforming plain text into cypertext Explain the difference between Symmetric Key and Public key encryption - correct answer ✔✔Symmetric key encryption - the same algorithm is used for encrypting and decrypting Public key encryption - a pair of keys are used in combination; one encrypt, the other to decrypt Explain what a virus is, and explain the difference between a virus and a worm - correct answer ✔✔A virus is a program that attaches its self to a program and self replicates. A worm is a piece of standalone software (whereas a virus conceals itself within another file) and a worm also replicates without user action (whereas a virus relies on user running program to replicate it.) Describe the steps that would be involved in producing a digital signature for the message before it is transmitted - correct answer ✔✔A hash is produced from the message contents and the hash is encrypted by the sending computer's private key. The encrypted hash is known as the digital signature. The signature is appended to the message. What is the purpose of a digital signature? - correct answer ✔✔To authenticate the identity of the sender / to detect is a message has been tampered with or changed. How can fraudsters obtain your PIN without you realising it? - correct answer ✔✔Hidden camera to record you entering your pin / watching as the pin is keyed in / false keypads - logs the input / phishing / hacking into servers / searching through dustbins to find documents When making online transactions, how can a purchaser know that the site is secure? - correct answer ✔✔By the padlock in the bottom right hand corner of the screen What security method is typically used for the transmission of personal data on a secure site? - correct answer ✔✔HTTPS What does HTTP stand for? - correct answer ✔✔HyperText Transfer Protocol

Explain how stateful inspection provides greater security against port scanning than simple packet filtering - correct answer ✔✔Stateful inspection examines the payload contents of each packet and creates contextual rules to keep open only the ports that are currently being used.