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Question 18/43
Which transport layer protocol is used to form LDP sessions?
Correct Answer: C
Explanation
LDP multicasts hello messages to a well-known UDP port (646) in order to discover neighbors. Once the discovery is accomplished, a TCP connection (port 646) is established and the LDP session begins. LDP keepalives ensure the health of the session. Thanks to the LDP session, LDP messages create the label mappings required for a FEC. Withdraw messages are used when FECs need to be torn down.
LDP multicasts hello messages to a well-known UDP port (646) in order to discover neighbors. Once the discovery is accomplished, a TCP connection (port 646) is established and the LDP session begins. LDP keepalives ensure the health of the session. Thanks to the LDP session, LDP messages create the label mappings required for a FEC. Withdraw messages are used when FECs need to be torn down.
- Question List (43q)
- Question 1: Refer to Exhibit. (Exhibit) Which statement about redistribu...
- Question 2: Refer to the exhibit. (Exhibit) An engineer is monitoring re...
- Question 3: Which protocol does VRF-Lite support?...
- Question 4: An engineer configured a company's multiple area OSPF head o...
- Question 5: Refer to the exhibit. (Exhibit) A client is concerned that p...
- Question 6: Drag and drop the packet types from the left onto the correc...
- Question 7: Refer the exhibit. (Exhibit) Which action resolves intermitt...
- Question 8: An engineer is configuring a network and needs packets to be...
- Question 9: Which two statements about VRF-Lite configurations are true?...
- Question 10: Drag and drop the SNMP attributes in Cisco IOS devices from ...
- Question 11: (Exhibit) Refer to the exhibit. an engineer is trying to get...
- Question 12: Which label operations are performed by a label edge router?...
- Question 13: Refer to the exhibit. (Exhibit) ISP 1 and ISP 2 directly con...
- Question 14: Refer to the exhibit. (Exhibit) An engineer receives this er...
- Question 15: A network engineer needs to verify IP SLA operations on an i...
- Question 16: Which is statement about IPv6 inspection is true?...
- Question 17: Refer to the exhibit. (Exhibit) During troubleshooting it wa...
- Question 18: Which transport layer protocol is used to form LDP sessions?...
- Question 19: What is a role of route distinguishers in an MPLS network?...
- Question 20: What is a prerequisite for configuring BFD?...
- Question 21: Refer to the exhibit. (Exhibit) Which statement about R1 is ...
- Question 22: Which protocol is used in a DMVPN network to map physical IP...
- Question 23: An engineer configured a leak-map command to summarize EIGRP...
- Question 24: Which two protocols can cause TCP starvation? (Choose two)...
- Question 25: Which SNMP verification command shows the encryption and aut...
- Question 26: Refer to the exhibit. (Exhibit) Which two actions should be ...
- Question 27: Refer to the exhibit. (Exhibit) An administrator that is con...
- Question 28: What does the PE router convert the IPv4 prefix to within an...
- Question 29: Which statement about IPv6 ND inspection is true?...
- Question 30: Which statement about IPv6 RA Guard is true?...
- Question 31: When provisioning a device in Cisco DNA Center, the engineer...
- Question 32: Refer to the exhibit. (Exhibit) After applying IPsec, the en...
- Question 33: Drag and drop the OSPF adjacency states from the left onto t...
- Question 34: Refer to the exhibit. (Exhibit) To provide reachability to n...
- Question 35: Which component of MPLS VPNs is used to extend the IP addres...
- Question 36: Refer to the exhibit. (Exhibit) An engineer has configured D...
- Question 37: During the maintenance window an administrator accidentally ...
- Question 38: An engineer configured the wrong default gateway for the Cis...
- Question 39: Refer to the exhibit. (Exhibit) Drag and drop the credential...
- Question 40: Refer to the exhibits. (Exhibit) Phase-3 tunnels cannot be e...
- Question 41: Refer to the exhibit. (Exhibit) A user cannot SSH to the rou...
- Question 42: An engineer needs dynamic routing between two routers and is...
- Question 43: Which protocol does MPLS use to support traffic engineering?...
