Hardware & Networking Engineer Interview Questions and Answers for Freshers

OSI layers work with various protocols including IP, TCP, DNS, and DHCP.

• OSI layers are a conceptual model for understanding how communication systems work.

• Layer 3 (Network layer) works with IP protocol for routing packets.

• Layer 4 (Transport layer) works with TCP protocol for reliable data transfer.

• Layer 7 (Application layer) works with DNS and DHCP protocols for name resolution and IP address allocation.

• Other protocols used in OSI layers include FTP, HTTP, SMTP, and SNMP.

To enable the secret password on a switch, use the 'enable secret' command in global configuration mode.

• Enter global configuration mode using 'configure terminal'.

• Use the command 'enable secret <password>' to set the secret password.

• Example: 'enable secret MySecurePassword' sets the secret to 'MySecurePassword'.

• The 'enable secret' command encrypts the password for security.