nokia 4A0-C04 Exam Questions
Questions for the 4A0-C04 were updated on : Nov 21 ,2025
Page 1 out of 20. Viewing questions 1-15 out of 298
Question 1
Which of the following is NOT considered an option of export policies?
- A. Advertising customer networks into BGP.
- B. Sending aggregates that summarize the AS s address space.
- C. Sending MEDs to influence ingress traffic from peers.
- D. Preventing unwanted NLRI from entering the AS.
Answer:
D
Question 2
Which of the following regarding "well-known discretionary'' BGP attributes is TRUE?
- A. They must be recognized by all peers and included in all BGP updates.
- B. They are discarded if not recognized by the recipient.
- C. They must be recognized by all peers and optionally included in BGP updates.
- D. The receiving router sends a notification if a well-known discretionary attribute is not present in an update.
Answer:
C
Question 3
Click the exhibit.
Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local
preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.
Assuming that none of the routers in AS 65540 is configured with "advertise-external", what is the
expected output of "show router bgp routes on router R1?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer:
C
Question 4
Which of the following statements regarding route reflectors is TRUE?
- A. Route reflectors propagate BGP learned routes to their clients.
- B. Route reflectors require "n" iBGP sessions, where "n" is the number of BGP routers in the AS.
- C. Route reflectors disable iBGP split horizon for all iBGP peers in the AS.
- D. Route reflectors do not work in conjunction with confederations.
Answer:
A
Question 5
Which regular expression will match the AS Path of a route originating in remote AS 65100?
- A. ".+ 65100"
- B. "65100.+"
- C. ".* 65100.*"
- D. "65100"
Answer:
A
Question 6
Click the exhibit.
Assume all router-IDs are properly configured, and IPv6 link-local addresses are used to establish all
eBGP sessions. Given the following iBGP configuration on router A, what is the Next Hop for prefix
2001:DB8:A:401::1/128 on router B?
- A. The IPv6 link-local address of the router D interface towards router A.
- B. The IPv6 link-local address of the router A interface towards router D.
- C. The IPv6 global address of router A.
- D. The IPv6 global address of router D.
Answer:
C
Question 7
Which of the following statements regarding Internet Exchange Points is FALSE?
- A. They provide both peering and transit services.
- B. They provide services only to Tier 1 service providers.
- C. They can be either public or private.
- D. They provide services at the local, regional and continental levels.
Answer:
B
Question 8
From what range are 16-bit private AS numbers selected?
- A. 64496 – 64511
- B. 1 – 56319
- C. 64512-65534
- D. 64513-65535
- E. There are no defined private AS numbers; there are only private IP addresses.
Answer:
C
Question 9
Which of the following statements about the BGP Advertise External feature is FALSE?
- A. It modifies the BGP advertisement logic.
- B. It improves convergence times and allows for better load sharing.
- C. It allows a router to advertise multiple external paths for a single prefix.
- D. It supports both IPv4 and IPv6.
Answer:
C
Question 10
Click the exhibit.
Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local
preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.
Assuming that router R6 is configured with "advertise-external", what is the expected output of
"show router bgp routes" when executed on router R1?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer:
D
Question 11
Click the exhibit.
Routers RR1 are RR2 are redundant route reflectors for clients R3 and R4. Which of the following is a
valid configuration on router RR1?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer:
C
Question 12
Click the exhibit.
AS 65100 is advertising 192.168.1.0/27 into BGP. Which of the following AS Paths would the prefix
192.168.1.0/27 contain when viewed on router R7?
- A. 65206 65202 65100
- B. (65206 65202)65100
- C. (65204 65206 65202) 65100
- D. (65200) 65100
Answer:
B
Question 13
Which of the following is considered a best practice for BGP address planning?
- A. Advertising external networks into IGP.
- B. Using system addresses for setting up iBGP sessions.
- C. Exporting the networks associated with the external links of eBGP peers into BGP.
- D. Optimizing BGP route table by exporting IGP routes into BGP.
Answer:
B
Question 14
Click the exhibit.
Assume all router-IDs are properly configured, and global IPv6 addresses are used to establish eBGP
sessions. Which of the following configurations is required on router A so that router B can exchange
traffic with router D?
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Answer:
A
Question 15
Click the exhibit.
An update travels from AS 137000 to AS 135000, traversing both 32-bit and 16-bit AS Paths.
What AS Path is seen by AS 200?
- A. 140000 137000
- B. 137000 140000
- C. 23456 23456
- D. 200 140000 137000
Answer:
C