Unit 2 - The Internet

Which of the following is FALSE about routers and routing on the internet?

• The central DNS server determines the shortest route for a packet to take between two IP addresses.

• Each router independently determines how to pass along each packet it receives.

• Packets often arrive in the wrong order or are lost entirely.

• Routers will attempt to find the quickest route to the packet's destination based on the information available to the router's software.

What information could you NOT determine ONLY from reading the router logs when we were chatting on the internet simulator in class?

• What IP address was sending a message.

• What IP address was receiving a message.

• The content of the message.

• The name of the person sending the message.

Which of the following is true about TCP/IP packets?

• Packets that are part of the same message may take different routes from sender to receiver.

• TCP guarantees that no packets are dropped in transit.

• Packets must arrive in the correct order at the receiver.

• If a packet is dropped, the entire message must be resent in order.

How does a computer resolve a domain name into an IP address?

• It asks its assigned DNS server.

• It checks its etc/hosts file.

• It consults the DDOS exchange.

• It is provided by the DHCP server on the server's subnet.

TCP - Transmission Control Protocol...

• ...provides reliable, ordered, and error-checked delivery of a stream of packets on the internet.

• ...translates domain names (like example.com) to IP addresses (like 93.184.216.34)

• ... is used for transmitting web pages over the Internet.

• ... is an easy-to-remember address for calling a web page (like www.code.org).

• ... provides a standard set of rules for sending and receiving data over the Internet.

DNS - Domain Name System...

• ...provides reliable, ordered, and error-checked delivery of a stream of packets on the internet.

• ...translates domain names (like example.com) to IP addresses (like 93.184.216.34)

• ... is used for transmitting web pages over the Internet.

• ... is an easy-to-remember address for calling a web page (like www.code.org).

• ... provides a standard set of rules for sending and receiving data over the Internet.

HTTP - Hypertext Transfer Protocol...

• ...provides reliable, ordered, and error-checked delivery of a stream of packets on the internet.

• ...translates domain names (like example.com) to IP addresses (like 93.184.216.34)

• ... is used for transmitting web pages over the Internet.

• ... is an easy-to-remember address for calling a web page (like www.code.org).

• ... provides a standard set of rules for sending and receiving data over the Internet.

URL - Uniform Resource Locator...

• ...provides reliable, ordered, and error-checked delivery of a stream of packets on the internet.

• ...translates domain names (like example.com) to IP addresses (like 93.184.216.34)

• ... is used for transmitting web pages over the Internet.

• ... is an easy-to-remember address for calling a web page (like www.code.org).

• ... provides a standard set of rules for sending and receiving data over the Internet.

IP - Internet Protocol...

• ...provides reliable, ordered, and error-checked delivery of a stream of packets on the internet.

• ...translates domain names (like example.com) to IP addresses (like 93.184.216.34)

• ... is used for transmitting web pages over the Internet.

• ... is an easy-to-remember address for calling a web page (like www.code.org).

• ... provides a standard set of rules for sending and receiving data over the Internet.

Which protocol is considered to be on the lowest level in the layers of the Internet?

• TCP/IP

• HTTP

• DNS

• None of the answers