https://youtu.be/L8zaNtp-afs

1. DNS
● Name resolution
○ Use hostname instead of IP address for operations
● 2 ways for DNS setting
○ On-device name resolution
■ Do not use DNS servers
○ Off-device name resolution
■ Use DNS servers

2. On-device Name Resolution
● Device resolves name by itself
○ Do not use DNS servers
● Command
○ set system static-host-mapping
■ Statically map hostname with IP address
■ Can also set alias name for hostname

3. Off-device Name Resolution
● Use DNS servers
● Command
○ set system name-server ipaddress

4. IP address for Lab
● google.com IP address
○ 172.217.18.206
● google public DNS IP address
○ 8.8.8.8