URLs, IP Addresses, and DNS

Question 1

Layers of Web Connection

Answer 1

Application Layer
Transport Layer
Internet Layer
Network Access Layer

Question 2

Application Layer

Answer 2

DNS Protocol and HTTP,HTTPS

Question 3

Transport Layer

Answer 3

UDP, TCP

Question 4

Internet Layer

Answer 4

Internet Protocol

Question 5

Network Access Layer

Answer 5

Network Access

Question 6

is a sequence of characters that identifies an abstract or physical resource.

Answer 6

Uniform Resource Identifier (URI)

Question 7

Identifies a resource either by location or name.

Answer 7

Uniform Resource Identifier (URI)

Question 8

identify a resource using a name.

Answer 8

Uniform Resource Name (URN)

Question 9

TRUE or FALSE:

Names used by the URN could have duplicates in the same name space

Answer 9

FALSE. name has to be unique across a namespace.

Question 10

are the most common way of identifying resources on the web.

Answer 10

Uniform Resource Locator

Question 11

Uniform Resource Locator identifies a resource using its _____________.

Answer 11

location

Question 12

The web identifies resources by _____________.

Answer 12

location (uses URL)

Question 13

TRUE or FALSE:

URLs can only refer to 1 resource .

Answer 13

FALSE. URLs may refer to more than 1 resource over time.

Question 14

At minimum, URLs need a _______ and ___________________.

Answer 14

Protocol, Domain Name

Question 15

Provide the Protocol and Domain for this URL

https://www.google.com/

Answer 15

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

Question 16

Declares how the browser should communicate with the server.

Answer 16

Protocol

Question 17

Other examples of network protocols other than http://

Answer 17

smtp://

smb://

ftp://

mongodb://

Question 18

The name of your website

Answer 18

Domain Name

Question 19

Domain name could be further broken down into _________ and _____________

Answer 19

Subdomains, Top-Level Domain (TLD)

Question 20

Provide the Subdomains and TLD in this URL:

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

Answer 20

subdomain: classroom
tld: com

Question 21

Refers to a file, resource, or directory in the server.

Answer 21

Path

Question 22

What is the path in this URL:

http://sarai.ph/about-us

Answer 22

/about-us

Question 23

What is the path in this URL:

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

Answer 23

/psp/ps/

Question 24

Commonly found in the URL of dynamic webpages. Preceded by the ? symbol.

Answer 24

Query

Question 25

What is the query in this URL? https://twitter.com/search?q=android&src=typd

Answer 25

?q=android&src=typd

Question 26

________________ make up the query string.

Answer 26

Parameters

Question 27

Parameters are ___________ separated by the ‘___’ symbol.

Answer 27

key-value pairs, &

Question 28

Give the parameter/s in this URL: https://twitter.com/search?q=android&src=typd

Answer 28

q=android, src=typd

Question 29

TRUE or FALSE: Ports are optional

Answer 29

TRUE

Question 30

Ports are preceded by a _

Answer 30

: (mykolon)

Question 31

It’s usually not explicitly included in the URL.

Answer 31

Port

Question 32

is a type of software connection point.

Answer 32

Port

Question 33

Usually denotes a specific type of process or service.

Answer 33

Port

Question 34

Some common default ports:

Answer 34

21 File Transfer 25 Simple Mail Transfer 80 HTTP 443 HTTPS (HTTP with TLS)

Question 35

Port number for HTTP

Answer 35

80

Question 36

Port Number for HTTPS

Answer 36

443

Question 37

TRUE or FALSE: It’s common practice to avoid ports of well-known apps if you are deploying your own apps.

Answer 37

TRUE

Question 38

What is the port for this URL (if there's any): https://classroom.google.com/u/0/h

Answer 38

:443 (HTTPS)

Question 39

The __________ is an internal reference to part of a page.

Answer 39

fragment

Question 40

Sometimes called ‘named anchor’.

Answer 40

fragment

Question 41

Fragments are marked by a _ symbol

Answer 41

#

Question 42

Identify: 1. Domain 2. Port 3. Query 4. Fragment https://www.youtube.com/watch?v=dQw4w9WgXcQ

Answer 42

Domain: www.youtube.com Port: 443 Query: ?v=dQw4w9WgXcQ Fragment: None

Question 43

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

Answer 43

Internet Protocol (IP)

Question 44

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

Answer 44

Internet Protocol (IP)

Question 45

is built on top of IP.

Answer 45

TCP

Question 46

It provides a reliable, connection-oriented communication system.

Answer 46

Transmission Control Protocol (TCP)

Question 47

2 major versions of IP in use:

Answer 47

IPv4 IPv6

Question 48

are numerical addresses assigned to machines in a network. Must be unique within a particular namespace.

Answer 48

IP Addresses

Question 49

In the ________________________, there are no two machines which are assigned the same public IP addresses.

Answer 49

global list of public IP addresses

Question 50

IPv4 addresses are composed of _____________________

Answer 50

4 8-bit numbers