Designation: Engineer – Networking

Role: L1 Engineer

Location: Chennai (Ambit IT Park)

Shifts: Flexible to work in Night Shifts

Job Responsibility

Troubleshoot/Diagnose all Level 1 issues from the customers and driving satisfactory resolution of the issues.

Troubleshoot Product, Codes and Configuration issues

Ensure consistent customer satisfaction

Document all communication with customers in the CRM

Interface with international customers (via Phone Support)

Timely handoff (escalation) of cases that require technical or political to L2 TAC

Primary Skills

OSI layers – detailed understanding of each layer’s function and relevant protocols that operates at each level

TCP/IP – thorough understanding and clear explanation about windowing/handshake mechanism

MAC header structure and use of each fields

IP header structure and use of each fields

ARP – how ARP works in a Layer 2 and Layer 3 communication

Mac address table fields and how a switch uses MAC table for switching decisions

ARP table and how a switch uses ARP table

Routing Table fields and how a Router uses routing table for routing decisions

DHCP protocol messages (transparent understanding of DORA process)

DHCP operation in layer 2 and layer 3 scenarios (server & client in same vlan or different VLAN)





thorough understanding of Broadcast domain and Collision Domain thorough understanding of Unicast, Multicast and Broadcast traffic thorough understanding of Subnetting, Vlan, VTP, 802.1q, STP, Linkage thorough understanding of RIP (version 1 and 2) and OSPF (link states, LSA types, area types, router types, neighbor communication)

Difference between Routing and Routed protocols

Good troubleshooting approach (from Level 1 to 7 of OSI)

Look into Wireshark capture 1:ARP learning process and it's flavour 2:How switch learns the mac address 3: DHCP server and Client communication in same network and different network 4:OSI headers Protocol and port number working OSI layer model and its learning of encapsulation and decapsulation 5: IP Addressing and Subnetting 6: Difference between layer two and three switch 7: DHCP, Switching and Routing with OSI headers STP Vlan Trunk and Access port how switch learns the mac address How ARP learns the mac address in same subnet and different subnet Difference between hub,layer2 switch and layer 3 switch and router DHCP DORA process sender IP,mac and port number and destination IP,mac and port number OSI: how to troubleshoot in network with help of OSI model. Data link header Ip header TCP header

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