Cisco 642-770 : Operational Foundations for Cisco Service Provider Core Networks
- Exam Code: 642-770
- Exam Name: Operational Foundations for Cisco Service Provider Core Networks
- Updated: Sep 13, 2026
- Q & A: 91 Questions and Answers
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Cisco 642-770 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Multicast and QoS in Service Provider Networks | - Quality of Service (QoS) design and implementation - IP multicast routing fundamentals |
| Routing Protocols in Service Provider Networks | - BGP fundamentals and service provider use cases - OSPF and IS-IS operation and optimization |
| Network Operations and Troubleshooting | - Service provider network monitoring and management - Troubleshooting routing and MPLS services |
| MPLS and VPN Technologies | - Layer 3 VPNs and service provider VPN services - MPLS architecture and label switching |
| Service Provider Core Network Fundamentals | - Service provider network architecture overview - Core routing and switching principles |
Cisco Operational Foundations for Cisco Service Provider Core Networks Sample Questions:
You are monitoring a corporate network when a number of routers begin reporting high CPU utilization. Console alarms indicate detection of excessive BPDUs. What is the probable cause of these threshold crossing alarms?
- A. multiple broken VLANs
- B. Spanning Tree Protocol failure
- C. loss of access to the Internet
- D. route flapping
Correct Answer: B 🗳️
You need to add a new DNS server to your Linux server. Where would you have to add the new DNS entry in the operating system?
- A. /etc/hosts.conf
- B. /etc/nsswitch.conf
- C. /etc/dns.conf
- D. /etc/resolv.conf
- E. /etc/sysconfig/network
- F. /etc/hosts
Correct Answer: D 🗳️
Which four methods are used to notify operations that a parameter has exceeded a predetermined baseline value? (Choose four.)
- A. SNMP trap
- B. threshold crossing alert
- C. console alarm
- D. configuration snapshot
- E. LEDs on processor
- F. syslog message
- G. LEDs on line cards
Correct Answer: A,B,C,F 🗳️
Refer to the exhibit.
The script returns this error:
Global symbol "$user" requires explicit package name at foo.pl.
What could be the cause of this error?
- A. Strict vars are in use.
- B. The sub call has an extra "&" character.
- C. use Global::user has not been declared.
- D. The global symbol for users must be declared.
Correct Answer: A 🗳️
Which two opportunities for improvement are realized by trending the metrics for the total number of trouble tickets by severity per period (total and by support queue)? (Choose two.)
- A. better incident resource allocation
- B. identifying the rate of change
- C. understanding the effects of the incident management process improvements
- D. collection of information relating to the incidents for higher-tier analysis
Correct Answer: A,C 🗳️
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