networking_cheatsheet
Networking
Transport
UDP >> UDP is a connectionless protocol
TCP is a connection-oriented protocol
DNS Record Types
SOA - Start of Authority record points to the primary authority for the domain we're querying
NS - Name Servers
directory for devices and the IP addresses attached to them
translate domain names into numerical IP addresses
A / AAAA - record that maps directly to an IP address
CNAME - record that acts as an alias
MX - Mail Exchanger - used for e-mail
Network Hardware
Router
contains internal addresses of each device connected to router
can join different networks, a feature switches and hubs cannot do
performs NAT (network address translation)
NAT allows router a single IP address
router can direct traffic to the appropriate address
Switch
contains the MAC (media access control) address of all - connected devices
flood - send to ALL connected devices β
forward - send to a particular device
filter - drop data entirely
Switch
no network management ,,,
signal splitter
duplicates data and broadcasts it to ALL connected devices
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