1).what is forest?
2).what is dns and dhcp port no's?
3).what is file system?
4).what is terminal server?
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why we need MAC address in data link layer?
1. What is the difference between layer 2 and layer 3 in the OSI model? 2. What is the difference between a hub, switch, and router? 3. What is a VLAN? 4. What is the difference between TCP and UDP? 5. How do you distinguish a DNS problem from a network problem? 6. What is a runt, Giant, and collision? 7. What is a broadcast storm? 8. What is the purpose of VRRP? 9. What is a VPN? 10. What information about a peer would I need to establish a VPN? 11. What is a full-class C in CIDR notation? 12. What is a default route? 13. What is a metric? 14. What is a MAC address? 15. What is ARP/RARP? 16. Describe a TCP connection sequence 17. What is MTU? 18. What other TCP setting can you modify besides MTU to shorten packets?
2 Answers 247Customer, Bharat BPO, Verinon Technology Solutions,
what is the command to check how many port numbers are running with their specific protocols in linux pc
What is the function of data link layer?
Explain pure-ALOHA and slotted- ALOHA systems. Give the expression for throughout for each,clearly explaining the various terms.
What is packet switching ? Explain two different approaches of packet switching. ?
wht is DSL?
What does ‘data transparency’ mean ? With the help of a flow chart, explain the process of bit de-stuffing at the receiver’s end.
What Fabric Switch hardware have you worked on? (like Cisco9000, Brocade 3250 etc)
What is TCP/IP ?
What are the different type of networking or internetworking devices?
What is your expertise with SymCLI? ( a few command-specific questions may follow)
Networking Protocols 
