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SMTP =Simple mail trasfer Protocol /imap or pop3 /WEB MAIL (SMTP SERVER…
SMTP =Simple mail trasfer Protocol /imap or pop3 /WEB MAIL
SMTP SERVER USING TCP PORT 25
CLIENT AND SERVER
DNS
steps
Browser and operating system cache
resolving name server
The Root
TLD server =**.com
Athoritarive name servers
DNS RECORDS
A & AAAA =IP Info
CNAME=alias
Mx =identifies a server for a domain
Service records = locates services on DNS AD
Start of authority(SOA) main server
DNS Zones =info for dns info to operate/portions of DNS
Primary /read -write | secondary Zone read only
Active Directory
Stub Zone / dirrects dns to a server that can resoslve it
Reverse lookup zone / troubleshooting
Sec
hash
SHA
MD5
SHA 256
encryption
aes
des
3des
enc
asimatric encripton
public keys are exchange
symetric
Combine private and public key to create a master key both
FTP
can be secure using SSL/TLS =ftps
ACTIVE
PASIVE
Contrl channel /Data cahnnel
LDAP/ lightweight Directory Access Protocol
Use to connect users to a dirrectory server
Directory is a set of records
IT USES TCP & UDP 389
level of access/ Read only and ready and write
is unsecure protect firewall to prevent external quiries