What is SGSN and GGSN in telecom?

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Tags

1. #internet
2. #responsible
3. #gateway
4. #mobile
5. #networks
6. #routed
7. #right
8. #switched
9. #packets
10. #support
11. #component
12. #external
13. #between
14. #interworking
15. #packet
16. #other
17. #originated
18. #network