ответ:The telecommunications infrastructure of a network operator consists of a set of networks
(transmission network, switching network, access network, signaling network, mobile
network, intelligent network, management network), each performing a particular function
towards the provision of the service to the customer. With the evolution towards IP-based
network, the circuit switched network is migrating towards a new architecture called Next
Generation Network (NGN) which emulates the behavior of circuit switching. With the advent
of broadband access networks, the core network evolves towards IP Multimedia Subsystem
(IMS) which provides IP-based multimedia services.
The objective of this tutorial is to briefly introduce the telecommunication network structure to
acquire the vocabulary of the field, understand the several types of networks involved in the
operator’s “Telecommunication Network”, and gain knowledge on how these
Объяснение:
1. What IS your name?— My name IS Ann.
2. What IS your address? — My address IS 175 Central Way.
3. What IS your phone number? — My phone number IS 718-19-30.
4. Where IS you from? — I AM from London.
5. What ARE you? — I AM a student.
6. Who ARE your parents? — My parents ARE Steve and Nancy.
7. What ARE they? — They ARE teachers.
8. What IS your uncle? — My uncle IS a doctor.
9. IS your aunt a doctor? — No, she IS not. She IS a housewife.
10. ARE they at home? — No, they ARE not at home, they ARE at work.
11. My brother IS a driver. He IS at work too.
12. IS your family big? — Yes, it IS
13. IS your sister tall? — No, she IS not. She IS a little girl. She IS five years old.
14. How old IS your brother? — Yes, he IS ten.
15. IS your brother at school?— No, he IS not at school.
16. My brother IS on holiday now.
17. ARE you a happy family? — Yes, we ARE. There ARE four of us.
