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Questions and Answers
Questions and Answers
What is the total number of hosts allowed in Class B IP addresses in the IPv4 version?
What is the total number of hosts allowed in Class B IP addresses in the IPv4 version?
- 254 hosts on 2 million networks each
- 16 million hosts on 127 networks each
- Reserved for multicasting
- 65,000 hosts on 16,000 networks each (correct)
Which organization manages and governs the IP address according to the text?
Which organization manages and governs the IP address according to the text?
- APNIC
- ARIN
- LACNIC
- IANA (correct)
What is the purpose of a DNS server in the context of the Internet?
What is the purpose of a DNS server in the context of the Internet?
- Identifies websites using IP addresses
- Reserves IP addresses for multicast use
- Handles domain name resolution only (correct)
- Converts IP addresses into domains
Which IP version is extensively used in the Internet according to the text?
Which IP version is extensively used in the Internet according to the text?
What does the dotted decimal notation represent in relation to IP addresses?
What does the dotted decimal notation represent in relation to IP addresses?
Which class of IPv4 IP addresses has 254 hosts allowed on 2 million networks each?
Which class of IPv4 IP addresses has 254 hosts allowed on 2 million networks each?
What is Hypertext Transfer Protocol (HTTP)?
What is Hypertext Transfer Protocol (HTTP)?
How does a client communicate with the server in HTTP?
How does a client communicate with the server in HTTP?
What is the primary function of HTTP?
What is the primary function of HTTP?
Which resources are involved in HTTP communication?
Which resources are involved in HTTP communication?
In the Internet stack, with which layers can HTTP communicate?
In the Internet stack, with which layers can HTTP communicate?
When was the first version of HTTP introduced?
When was the first version of HTTP introduced?
What is the primary purpose of an IP address in the context of the Internet?
What is the primary purpose of an IP address in the context of the Internet?
Which protocol is predominantly used for data transmission across the Internet?
Which protocol is predominantly used for data transmission across the Internet?
What significant event marked the beginning of the internet's evolution during the Cold War era?
What significant event marked the beginning of the internet's evolution during the Cold War era?
Which of the following is NOT considered a major service offered by the Internet?
Which of the following is NOT considered a major service offered by the Internet?
Who announced that a network of computers in the US would continue to operate even in the case of a nuclear attack?
Who announced that a network of computers in the US would continue to operate even in the case of a nuclear attack?
Which organization was formed by the US government in response to the launch of SPUTNIK?
Which organization was formed by the US government in response to the launch of SPUTNIK?
What is the primary function of a DNS server?
What is the primary function of a DNS server?
Where are the major 13 DNS root name servers located?
Where are the major 13 DNS root name servers located?
What is the responsibility of DNS servers linked to the major 13 root servers?
What is the responsibility of DNS servers linked to the major 13 root servers?
What is the role of routers in the context of domain names and IP addresses?
What is the role of routers in the context of domain names and IP addresses?
Which public DNS servers are mentioned in the text?
Which public DNS servers are mentioned in the text?
How does a DNS server play a role in the communication between hosts and routers?
How does a DNS server play a role in the communication between hosts and routers?
What is the relationship between HTTP and the World Wide Web?
What is the relationship between HTTP and the World Wide Web?
When was the WWW introduced?
When was the WWW introduced?
How does the Internet differ from the WWW?
How does the Internet differ from the WWW?
Who regulates the WWW network-based information?
Who regulates the WWW network-based information?
What is the main purpose of HTTP?
What is the main purpose of HTTP?
When did the WWW become publicly available for use?
When did the WWW become publicly available for use?
Questions and Answers
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Study Notes
Study Notes
IPv4 IP Addresses
- Class B IP addresses allow a total of 65,534 hosts.
- The Internet Corporation for Assigned Names and Numbers (ICANN) manages and governs IP addresses.
DNS Servers
- DNS servers translate human-readable domain names to IP addresses.
- The primary function of a DNS server is to resolve domain names to IP addresses.
- The 13 DNS root name servers are located in different parts of the world.
- DNS servers linked to the major 13 root servers are responsible for resolving domain names to IP addresses.
- DNS servers play a role in communication between hosts and routers by resolving domain names to IP addresses.
HTTP and the World Wide Web
- HTTP (Hypertext Transfer Protocol) is a protocol used for data transmission across the Internet.
- HTTP is predominantly used for data transmission across the Internet.
- The primary function of HTTP is to transfer data between clients and servers.
- HTTP communicates with servers through requests and responses.
- HTTP resources involved in communication include clients, servers, and proxies.
- HTTP can communicate with the application, presentation, and session layers in the Internet stack.
- The first version of HTTP was introduced in 1991.
- The primary purpose of HTTP is to transfer data between clients and servers.
Internet History and Services
- The Internet evolved during the Cold War era, with a significant event marking its beginning in 1969.
- The Internet does not offer phone services as one of its major services.
- The US government formed the Advanced Research Projects Agency (ARPA) in response to the launch of SPUTNIK.
- Paul Baran announced that a network of computers in the US would continue to operate even in the case of a nuclear attack.
IP Addresses and Routers
- Dotted decimal notation represents IP addresses in four numbers separated by dots.
- Class A IPv4 IP addresses have 254 hosts allowed on 2 million networks each.
- IP addresses are used to identify devices on the Internet.
- Routers forward data packets between networks using IP addresses.
World Wide Web
- The World Wide Web (WWW) is a system of interlinked hypertext documents.
- The WWW was introduced in 1991 by Tim Berners-Lee.
- The WWW is different from the Internet, as it is a system of interlinked documents on top of the Internet infrastructure.
- There is no central governing body regulating the WWW network-based information.
- The WWW became publicly available for use in 1991.
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