Network

DNS

DHCP

Switch

Router

Load Balancer

Subnet

IP

ARP

Address Resolution Protocol

ARP cache table

ARP Request - Broadcast...Who is having this IP address xyz ??

ARP Response - Hey its me.. here is my MAC address. Please update your cache.

ARP Watch - monitor ARP traffic

cmd > arp -a

Wireshark - Captures network traffic

SSL Cryptography

• Asymmetric Key
  • Public Key + Private/Secret Key
  • Asymmetric keys of length 2048 bits is considered safe
  • Slow
  • Used by client to share the session key(random) with server
  • encryption algorithms like RSA and Elliptic Curve Cryptography (ECC)
• Symmetric Key
  • Common Session key is shared between sender and receiver offline/secretly.
  • Fast