Core Networking

There is lot of scope in networking field (Datacom) as Telecom is also included in it. Datacom and Telecom are now merged together.
There are many companies in India that work on hardware and software such as:
1. Aristra Networks.
2. Aricent.
3. AVAYA.
4. Brocade Communications.
5. CISCO.
6. Ciena.
7. Ericsson.
8. Juniper Networks.
9. Hughes Systique.
10. Huawei.
11. NEC.
12. Samsung R&D.
13. Tejas Networks.
14. TATA Communications.
15. ECI telecom.
16. Nokia/Alcatel Lucent.
17. IXIA.
18. Novell.
19. Oracle.
20. Reliance Jio.
21. Symphony Teleca.
22. Spirent Communications.
23. IP Infusion.
For software testing (Automation Testing):
Testing domain requires Shellscript and Python with automation framework such as robot or worked with openstack (NFV) in Python. Java programming language with Selenium framework or with Opendaylight (SDN) related development.
For hardware testing:
Working with switch and router(L2/L3) also expertise with routing protocol testing such as OSPF, BGP and other protocols such as RSTP, MPLS, RIP , IPv6 ,SNMP, SONET, SDH.

CISCO certification are well recognised certifications which can help candidates to have long term well paid networking career. CISCO offers five levels of network certification: Entry, Associate, Professional, Expert and Architect, the highest level of accreditation within the Cisco Career Certification program. You may refer to following link for details of all CISCO certifications: http://www.cisco.com/c/en/us/training-events/training-certifications/certifications.html#~Cert.
CISCO also has specialist certifications. The Specialist designation certifies the specific expertise of technical professionals, including those with Cisco Career Certifications at the associate, professional or expert levels. By earning specialist certifications, network professionals can enhance their core networking knowledge in technologies such as security, data centre or video. You can start with CCENT and the CCT certifications to start career as a networking professional. You may do network courses from any CISCO authorised training partner.