SDN is a new type of network innovation architecture.
Which of the following descriptions about the value of SDN is correct? (Multiple choice)

• A.Realize centralized management and simplify network management and operation and maintenance
• B.Shield technical details, reduce network complexity, and reduce operation and maintenance costs
• C.Realize automatic tuning and improve network utilization
• D.Realize rapid service deployment and shorten service launch time

Comment: *

Name: *

Email: *

Verification: *

The Neighbor Discovery Protocol (NDP) is an important basic protocol in the IPv6 protocol suite and plays an important role. Which of the following functions and features does it support?

• A.Address resolution
• B.Neighbor state tracing
• C.Duplicate address detection
• D.Redirection

Comment: *

Name: *

Email: *

Verification: *

A router performs a lookup in its FIB table for a packet. If the tunnel ID in the matching entry is 0, the packet needs to be forwarded through a tunnel, such as an MPLS tunnel.

• A.TRUE
• B.FALSE

Comment: *

Name: *

Email: *

Verification: *

When OSPF runs in the broadcast network, it is necessary to elect DR and BDR. Which of the following states will carry out the election of DR and BDR?

• A.2-way
• B.Full
• C.Exchange
• D.Init

Comment: *

Name: *

Email: *

Verification: *

As shown in the figure, R1 and R2 are in a VRRP backup group, if R1 fails, which of the following actions will R2 perform?

• A.Switch to Master device after about 0.22 seconds
• B.Do nothing and keep the original state
• C.Switch to Master device after about 3.61 seconds
• D.Switch to Master device after about 0.61 seconds

Comment: *

Name: *

Email: *

Verification: *