1.2. Communication and Internet technologies
A subsection of Computer Science, 9608, through 1. Theory Fundamentals
Listing 10 of 44 questions
Computer A needs to access a web page. State how Computer A could access the web page without using a Domain Name Service (DNS). The following table shows four IPv6 addresses. State if each address is valid or invalid. IP address Valid or invalid 21E5:69AA:FFFF:1:E100:B691:1285:F56E ::255.255.255.255 59FB::1005:CC57:6571 56FE::2159:5BBC::6594 The following table shows four statements about either public or private IP addresses. Tick (3) one box in each row to indicate whether each statement refers to a public or a private IP address. Statement Public Private 192.168.2.1 is an example of this type of address Assigned by the Internet Service Provider (ISP) IP address cannot be duplicated in different networks Network Address Translation (NAT) is necessary to access the Internet directly One type of transmission media is copper cable. Give two additional types of transmission media.
9608_w18_qp_11
THEORY
2018
Paper 1, Variant 1
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A laptop on a home network connects to the Internet through a router. The laptop has an IP address. Give the reasons why the laptop has an IP address. The laptop’s IP address is private. Give the reasons why the laptop does not have a public IP address. The router has an IPv4 address. Give three differences between the format of an IPv4 address and an IPv6 address. A Public Switched Telephone Network (PSTN) is one example of a communication system that can be used to support the Internet. Identify and describe two other communication systems that can be used to support the Internet. System 1 Description System 2 Description A web page contains PHP code. Complete the following table by writing a description of the function of each line of PHP code. PHP code Description echo "Hello World"; $number1 = 22; $newValue = $_GET["number"]; print "Hello " . $name . ""; PHP is a server-side scripting language. Give an example of a client-side scripting language. The laptop includes a parity bit in each byte it transmits. Explain how parity checks protect the integrity of the data.
9608_w20_qp_13
THEORY
2020
Paper 1, Variant 3
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Gopal types the Uniform Resource Locator (URL) of a website into a web browser. The following sequence (1 to 5) describes the steps that take place. There are three missing statements. Gopal types into the web browser. DNS looks up the URL in table Three statements A, B and C are used to complete the sequence. A DNS finds corresponding IP address B Web browser sends URL to Domain Name Service (DNS) C DNS returns IP address to web browser Write one of the letters A to C in the appropriate rows (2, 4 and 5) to complete the sequence. Describe the purpose of an IP address. A telecommunications operator has installed fibre-optic cables in Gopal’s neighbourhood. Give three benefits of fibre-optic cable over copper cable. Give two drawbacks of fibre-optic cable over copper cable.
9608_w18_qp_12
THEORY
2018
Paper 1, Variant 2
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Devices connected to the Internet have IP (Internet Protocol) addresses. Three IPv4 addresses are given. Circle either Valid or Invalid to indicate whether each address is valid or invalid. Explain your decision. Address 1: 3A.21.2H.1 Valid / Invalid Explanation Address 2: 299.53.2.2 Valid / Invalid Explanation Address 3: 192.2.1.0 Valid / Invalid Explanation A website can be accessed using either the Uniform Resource Locator (URL) or the IP address. Describe how a URL is converted into its matching IP address. People use the Internet to stream media. Complete the following statements by filling in the names of the missing methods of bit streaming. bit streaming is used when watching a live stream of events that are currently taking place. The event is captured live with a video camera connected to a computer, and it cannot be paused or rewound. bit streaming is used when watching an event that has taken place in the past. Existing media are encoded to bit streaming format and uploaded to a server. It can be paused and rewound. A recording of a concert is stored as a file. The file is compressed using lossy compression before it is streamed to users. State why this file needs to be compressed. Define the term lossy compression. The file could be compressed using lossless compression. Explain why lossy compression is a more appropriate compression technique than lossless for this file.
9608_s19_qp_11
THEORY
2019
Paper 1, Variant 1
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The table shows four statements about IP addresses. Tick (✓) to show which of the statements are true. Statement True (✓) The IP address consists of any number of digits separated by single dots (.) Each number in an IP address can range from 0 to 255 IP addresses are used to ensure that messages and data reach their correct destinations Public IP addresses are considered to be more secure than private IP addresses Consider the URL: http://cie.org.uk/computerscience.html Give the meaning of the following parts of the URL. http cie.org.uk computerscience.html Sometimes the URL contains the characters %20 and ?. Describe the function of these characters. %20 ?
9608_w15_qp_11
THEORY
2015
Paper 1, Variant 1
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The table shows four statements about IP addresses. Tick (✓) to show which of the statements are true. Statement True (✓) The IP address consists of any number of digits separated by single dots (.) Each number in an IP address can range from 0 to 255 IP addresses are used to ensure that messages and data reach their correct destinations Public IP addresses are considered to be more secure than private IP addresses Consider the URL: http://cie.org.uk/computerscience.html Give the meaning of the following parts of the URL. http cie.org.uk computerscience.html Sometimes the URL contains the characters %20 and ?. Describe the function of these characters. %20 ?
9608_w15_qp_13
THEORY
2015
Paper 1, Variant 3
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Questions Discovered
44