Cisco 642-770 : Operational Foundations for Cisco Service Provider Core Networks

642-770 real exams

Exam Code: 642-770

Exam Name: Operational Foundations for Cisco Service Provider Core Networks

Updated: May 28, 2026

Q & A: 91 Questions and Answers

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Cisco Operational Foundations for Cisco Service Provider Core Networks Sample Questions:

1. You have just completed a comprehensive study of the traffic patterns in your network. As you review the results, you discover a remote office that has not had any particular problems. However, the volume of voice quality related tickets has increased in the last two weeks. Which two possible causes would the traffic study show? (Choose two.)

A) The circuit to this office is significantly oversubscribed.
B) QoS is missing from the circuit configuration to this site.
C) The circuit to this location experiences brief periods of congestion and excessive retransmits during these periods.
D) The circuit to this office has excessive errored seconds continuously through the day.
E) The route to this office is suboptimal and during peak traffic may cause a delay in packet delivery.


2. You use a method of procedure for a planned configuration change with a software upgrade on a router. If the software was corrupt, which section of the method of procedure would you refer to?

A) reload procedures
B) terminal report procedures
C) backout procedures
D) reinstall procedures


3. According to the ITIL@ v3 framework, what four benefits are realized from release management in the service transition process? (Choose four.)

A) testing before rollout, which minimizes incidents that affect users and requires less reactive support
B) a structured approach to rolling out all new software or hardware, which is efficient and effective
C) validation and acceptance of services by users before services are put in the production environment
D) certification of hardware used in rollout to meet criteria specified for the production environment
E) the opportunity to plan expenditure and resource requirements in advance
F) changes to software are "bundled" together for one release, which minimizes the impact of changes on users


4. What is the range of DLCIs that are available for subscribers to configure on a Cisco IOS Frame Relay subinterface?

A) 0-1024
B) 0-991
C) 1-2048
D) 16-1007


5. Which command displays the target configuration in Cisco IOS XR Software?

A) show config running
B) show running-config
C) show config merge
D) show config


Solutions:

Question # 1
Answer: B,E
Question # 2
Answer: C
Question # 3
Answer: A,B,E,F
Question # 4
Answer: D
Question # 5
Answer: D

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