Question 1

Which of the following security technologies are used on a 5G network? -MC

Options :

A : End-to-end security protection between PLMNs .

B : 256-bit encryption algorithm.

C : Integrity protection on the user plane over the air interface.

D : Encrypted IMSI transmission.

Answer: A,B,C,D

Question 2

Which of the following massive MIMO statements are correct? -MC

Options :

A : Massive MIMO uses Large-scale antenna arrays

B : Massive MIMO improves capacity of a single call

C : Only horizontal beamforming is available

D : Legacy wide beams are replaced with narrow beams by adjusting then beam weight.

Answer: A,B,D

Question 3

What is the bandwidth requirement for point access of 5G bearer sites? (single-choice question, 4 points)

Options :

A : 10G

B : 100G

C : 5G

D : 1G

Answer: A

Question 4

The description of 5G core network deployment is correct (multiple choice, 4 points)

Options :

A : MCEs are mostly deployed in common aggregation equipment rooms or CO points to realize low-latency service processing

B : EPC cooperates with CDN to sink to the backbone aggregation equipment room

C : 5G core network SGW deployed in provincial capital cities

D : The NB-IOT gateway is deployed at a high level in the core computer room to achieve the best efficiency

Answer: A,B,D

Question 5

The impact of the 5G core network on the bearer network mainly includes (multiple choice, 8 points)

Options :

A : Vertical business—>N2/N3 layered termination, flexible attribution

B : L3 layer to edge

C : Horizontal service—>gNB-gNB(X2), DU-DU, CU-CU

D : Converged connection—>Full Mesh connection, the number of connections increases exponentially.

Answer: A,C,D

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