DNS
Answer 1
A domain name server resolves the web address into the correct IP address (1 mark).
The operating system compares the domain name with the domain name that is
currently being referenced (1 mark).
If the names match then the web page is...
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DNS
Answer 1
A domain name server resolves the web address into the correct IP address (1 mark).
The operating system compares the domain name with the domain name that is
currently being referenced (1 mark).
If the names match then the web page is displayed (1 mark).
If no match found then it is passed on to another DNS (1 mark).
If not resolved then timeout error (404) is returned (1 mark).
Answer 2
• DNS • Looks up (references, changes, converts)
• IP address
• If not found, passes it on to another server
• Idea of hierarchy
• If not found at all, error 404
Structure of a URL
http://www.
Click&Get.
co.
uk/images/CG212.
jpg
protocol - http://
domain name - www.
Click&Get.
co.
uk
path - /images
port - 21
file identifier - /CG212.
jpg
W3C
W3C (1 mark)
developments / standards (1 mark)
on the WWW (1 mark)
deals with HTML (1 mark)
ICANN
ICANN (1 mark)
• responsible for distribution of IP addresses and domain names (1 mark)
OR
• as they will need more IP addresses for the greater num
Less
