Which of the following routers can initiate SPT switchover on a PIM-SM network? (Choose two.)
A. Last-hop router
B. Intermediate router
C. RP
D. Source's DR
How many default zones does the USG supporting multi-instance have?
A. Two
B. Three
C. Four
D. Five
To which attribute type does the BGP AS-Path attribute belong?
A. Well -known Mandatory
B. Well-known Discretionary
C. Optional Transitive
D. Optional Non-transitive
VLANs isolate broadcast domains, eliminates broadcast storms, and enhances information security.
A. True
B. False
Which of the following describes the relationship between BGP and AS?
A. BGP only runs between ASs, and cannot run within an AS.
B. BGP is an EGP used by ASs to exchange routing information with other ASs.
C. BGP builds network topologies by exchanging link-state information between ASs.
D. BGP cannot run between ASs.
RTA is a source's DR and RTB is an RP. A multicast source sends multicast data to RTA but RTB cannot find any information about the multicast source (registered by using the PIM Register message). Why? (Choose three.)
A. RTB has no unicast routes to RTA.
B. RTA fails to learn RP information.
C. RTA has no unicast routes to RTB.
D. The RP learned by RTA is not RTB.
Which of the following statements regarding RPs are true? (Choose three.)
A. Different group addresses on a PIM-SM network corresponds to different RPs.
B. An RP is the root of an RPT.
C. An RP is elected out of BSRs.
D. All routers on a PIM-SM network must automatically discover the location of RPs.
BGP is an exterior gateway protocol which runs between ASs. It focuses on the control of route propagation and selection of optimal routes rather than discovery and calculation of routes.
A. TRUE
B. FALSE
Which of the following are migration difficulties? (Choose all that apply.)
A. Minimizing on services
B. Achieving optimal risk prevention
C. Formulating a complete migration solution
D. Carrying out the migration smoothly
A 32-bit MPLS header consists of a 20-bit label used for packet forwarding, a 3-bit EXP field that identifies the IP packet priority, a 1-bit bottom-of-stack flag that identifies the last label, and an 8- bit ITL field. Which statement about the ITL field is true?
A. It is used to prevent packet forwarding loops, similar to the TTL field in an IP header.
B. It is used for label management.
C. It specifies the upstream device in label distribution
D. It controls the LSR.
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