Networks (OCR A-Level Computer Science): Flashcards
📚Flashcards
Practise the cards
12 cards from this deck
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Practise the cards
12 cards from this deck
What is DNS's primary function?
What is DNS's primary function?
Converts domain names to IP addresses
What metaphor describes DNS?
What metaphor describes DNS?
Internet's 'phonebook'
Root DNS servers: level and role?
Root DNS servers: level and role?
Highest level, manage requests for TLDs
What do TLD DNS servers manage?
What do TLD DNS servers manage?
Specific TLDs like .com, .org, .UK
What do authoritative DNS servers hold?
What do authoritative DNS servers hold?
Actual IP addresses for domains
First step in DNS lookup
First step in DNS lookup
Check local cache for IP address
Who provides recursive resolvers?
Who provides recursive resolvers?
ISP or DNS service like Google DNS
A Record maps domain to
A Record maps domain to
IPv4 address
AAAA Record maps domain to
AAAA Record maps domain to
IPv6 address
CNAME Record function
CNAME Record function
Points one domain name to another
MX Record specifies
MX Record specifies
Mail server for domain's email
DNS system structure type
DNS system structure type
Distributed, hierarchical system