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ISDS3105 Midterm Exam with Complete Solutions
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ISDS3105 Midterm Exam with Complete Solutions
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ISDS3105 Midterm Exam with Complete SolutionsWeb resource CORRECT ANS-any retrievable item, like an HTML file, image, video, CSS
style sheet, etc.
Parts of a URL CORRECT ANS-Example: http://www.cdc.gov/alcohol/faqs.htm
Scheme: characters at the beginning of a URL followed by ":" or "://". Include http, https,
mailto, and file
Hostname: complete domain name following the scheme. Example is "www.cdc.gov"
Path: characters to the right of the hostname in a URL. Example is "/alcohol"
Query string: optional characters to the right of the question mark in a URL that provide data
for the web server. In https://www.youtube.com/watch?v=uu7XCEMdSHg, the characters
after the ? tells YouTube's server to play a video having code uu7XCEMdSHg.
Fragment: optional characters at the end of a URL that start with a # and refer to a certain
location within a webpage. In https://en.wikipedia.org/wiki/URL#History, the fragment
"#History" refers to the webpage's History section.
404 CORRECT ANS-If a web server is reached, but the specific requested page isn't found,
the server returns a 404 status code, which is a code number for page not found. Linkrot is the
general name for a once valid link that now returns a 404 status code.
, ISDS3105 Midterm Exam with Complete Solutions
HyperText Transfer Protocol (HTTP CORRECT ANS-a networking protocol that runs over
TCP/ICP and governs communication between web browsers and web servers
Transmission Control Protocol/Internet Protocol (TCP/IP) CORRECT ANS-protocol suite that
governs how data packets are transferred over the internet from one machine to another
DNS lookup CORRECT ANS-Before HTTP communication begins, the web browser extracts
the domain name from the URL being accessed and performs a DNS lookup. This is done by
sending the domain name to the local DNS and getting back the IP address of the web server
hosting the domain name.
HTTP request CORRECT ANS-message sent from the web browser to the web server. often
the request asks the web server to send back a web resource like an HTML file, image, CSS
stylesheet, JavaScript file, or video
HTTP response CORRECT ANS-message sent from the web server back to the web browser
in response to an HTTP request. often the response contains the requested web resource
Parts of an HTTP request/response CORRECT ANS-1. Start line: specifies the HTTP version
being used. A request's start line includes a request type and path; a response's start line
includes a status code and phrase.
2. Zero or more header fields: a keyword followed by a colon and a value. Header fields
supply additional information about the request or response.
, ISDS3105 Midterm Exam with Complete Solutions
3. A blank line.
4. Optional message body: contains data being transferred between a web browser and web
server. In a request, the message body may be empty or contain submitted form data. In a
response, the message body may contain the requested resource.
HTTP request method CORRECT ANS-indicates the desired action to perform on a resource.
Common HTTP request methods:
GET = request a representation of the specified resource
HEAD = request a response identical to GET but without the response body
POST = create a new resource with the contents of the message body
PATCH = modify an existing resource with the contents of the message body
PUT = replace an existing resource with the contents of the message body
DELETE = delete an existing resource
HTTP response status code CORRECT ANS-3 digit number that indicates the status of the
requested resource
Common HTTP response status codes:
200 (OK): standard response for a successful request
301(Moved Permanently): the resource should always be requested at a different URL
302(Found): the resource should temporarily be requested at a different URL
304(Not Modified): the resource has not been modified since the last time the resource was
requested
403(Forbidden): the web browser does not have permission to access the resource
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