URLs, IP Address, and DNS

Question 1

By order, what are the layers TCP/IP?

Answer 1

Application Layer
Transport Layer
Internet Layer
Network Access Layer

Question 2

In the Application Layer, what can be found here?

Answer 2

DNS protocol, HTTP, HTTPS

Question 3

In the transport layer, what can be found here?

Answer 3

UDP and TCP

Question 4

In the internet layer, what is part of this?

Answer 4

Internet Protocol

Question 5

In the network access layer, what can be found here?

Answer 5

network access

Question 6

This is a sequence of characters that identifies an abstract or physical resource. It identifies a resource either by location or name

Answer 6

URI (Uniform Resource Identifier)

Question 7

This identify a resource using a name. This name has to be unique across a namespace

Answer 7

URN (Uniform Resource Name)

Question 8

This are the most common way of identifying resources on the web. It identifies a resource using its location.

Answer 8

URL (Uniform Resource Locator)

Question 9

At minimum, what does URLs need?

Answer 9

Protocol and Domain Name

Question 10

https://www.google.com

In this example, which is the protocol and the domain?

Answer 10

Protocol: https://
Domain: www.google.com

Question 11

This declares how the browser should communicate with the server

Answer 11

Protocol

Question 12

This is the name of your website

Answer 12

Domain Name

Question 13

Domain can be further broken down into?

Answer 13

Subdomains and top-level domain

Question 14

https://classroom.google.com/u/0/h

in this example, what is the top level domain? what is the subdomain?

Answer 14

Top level domain: com
Subdomain: classroom

Question 15

What usually designate a specific area of your site?

Answer 15

Subdomains

Question 16

This refers to a file, resource, or directory in the server

Answer 16

path

Question 17

http://www.somewebsite.com/index.html

https://sais.up.edu.ph/psp/ps/?cmd=login

which is the path here?

Answer 17

index.html

/psp/ps/

Question 18

This is commonly found in the url of dynamic web pages. preceded by the ? symbol

Answer 18

query

Question 19

https://twitter.com/search?q=android&src=typd

in this example, which is the query?

Answer 19

?q=android&src=typd

Question 20

What makes up the query string? These are key-value pairs separated by the & symbol.

Answer 20

Parameter

Question 21

https://sais.up.edu.ph/psp/ps/?cmd=login

in this which is the parameter? what is the key? what is the value?

Answer 21

cmd=login
key: cmd
value = login

Question 22

This is an optional part of URLs preceded by a :. It’s usually not explicitly included in the URL

Answer 22

Port

Question 23

port 21 is for?

Answer 23

file transfer

Question 24

port 25 is for?

Answer 24

simple mail transfer

Question 25

port 80 is for?

Answer 25

HTTP

Question 26

port 443 is for?

Answer 26

HTTPS

Question 27

This is an internal reference to. part of a page. Marked by # symbol

Answer 27

Fragment

Question 29

Fragment is sometimes called as?

Answer 29

named archor

Question 30

What are the cons of IP?

Answer 30

Provides unreliable, connectionless delivery system used by machines in a network to communicate

Question 31

What is IP responsible for?

Answer 31

addressing within a network, encapsulating data into diagrams, and routing datagrams from source to destination.

Question 32

What is built on top of IP to provide reliable, connection-oriented communication system?

Answer 32

TCP

Question 33

what are the 2 major version of IP in use?

Answer 33

IPv4 and IPv6

Question 34

IP addresses are numerical addressed assigned to machines in a network, now, should they be unique within a particular namespace? Yes or no

Answer 34

Yes

Question 35

Is it true that in the global list of public IP addresses, there are no two machines which are assigned the same public IP addresses?

Answer 35

True

Question 36

The version of this IP addresses are composed of 4 8-bit numbers

Answer 36

IPv4

Question 37

How many combinations are there in IPv4? And did it ran out? when?

Answer 37

2^32 ~ 4.3 billion combination. Yes they ran out in 2011

Question 38

This version of addresses are composed of 8 4-decimal numbers

Answer 38

IPv6

Question 39

How many possible combination are there for IPv6?

Answer 39

2^128

Question 40

What is the hierarchical naming system for resources on the Web?

Answer 40

Domain Name System (DNS)

Question 41

This is the process of retrieving the IP address associated with a domain name

Answer 41

Domain Name Resolution

Question 42

These are servers that keep the DNS records

Answer 42

Domain name system servers

Question 43

These are maps of domain names to IP address.

Answer 43

DNS record

Question 44

This is a program that is a components of a browser, OS, or other network programs. It connects to DNS servers to request records using the dns protocol.

Answer 44

DNS Client

Question 45

This server stores the master copies of the DNS records

Answer 45

Authoritative DNS servers

Question 46

This server cache commonly requested records. If they don't have it, they make request to other DNS servers.

Answer 46

Recursive DNS Servers.

Question 47

This is a nonprofit organization responsible for coordination and maintenance of database related to Internet namespaces.

Answer 47

Internet Corporation for Assigned Names and Numbers (ICANN)

Question 48

This is a department under ICANN that coordinate the DNS Root, IP addressing, and other IP resources

Answer 48

Internet Assigned Numbers Authority (IANA)

Question 49

These are governed by ICANN. They are the last segment of a domain name and are usually descriptive of the site.

Answer 49

Top Level Domain

Question 50

This type of TLD is when anyone can register with little restrictions. They are the most common of the TLDs

Answer 50

Generic TLD

Question 51

This TLD is restricted to a country or any dependent territory identified with a country code.

Answer 51

Country code TLD