Scenario based questions as well as troubleshooting problems. Was given a scenario where traffic could reach from one host to another hosts which are connected via a series of switches and routers. Was asked to walk through how I would troubleshoot the given problem.
About the TCP/ip model in depth
Explain ARP packet flow? different types of ARP
Phone questions included basic questions about networking, proxies and dns, they asked about a problematic situation i faced in the past and how did I resolve it. In person interview consisted of 2 role play scenarios in which I was to troubleshoot the client network. The objective was to use soft skills to manage the situation, get the required information and based on this information provide a problem description, conclusions if possible and finally provide an action plan. This was followed by crunching 25-30 page documentation within an hour of preparation time and doing a little presentation on the topic. Finally, I had both a managers questioning as well as technical questioning. Questions ranged from explaining OSPF, comparing it to EIGRP, STP Loop prevention mechanisms ...
1- Tell me about yourself. 2- Network classes? 3- What is Subetting? 4- What is subnet mask? 5- Different types of network and different type of topology? 6-OSI model? how is it different from TCP/IP model? 7- What is DNS? 8- Explain tcp vs udp communication. 9- Difference between Hub and Switch?
Introduce yourself. what is a subnet mask? what is ACL? Describe OSI Model.
TCP Padding. Firewall question BGP. Basic knowledge of subnets. .
How do you rebuild this phone?
Networking basics- routing protocols, TCP- UDP, OSI Model, 3 way handshake, port and protocol number, ARP and other protocols etc., email flow, packet flow Security:- Firewall, IDS-IPS, Encryption, IPSec and SSL VPN, Cryptography, DDoS attack, Phishing, CIA triangle. Commands:- ipconfig, tracert, ping, nets at,ns lookup, One scenario based question from routing and firewall
Please explain option field in the TCP header?
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