Download Cisco : 642-885 Questions & Answers as PDF & Test Software
Updated: Jun 16, 2026
No. of Questions: 131 Questions & Answers with Testing Engine
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Cisco 642-885 Exam Topics:
| Section | Weight | Objectives |
|---|---|---|
| Multicast Routing in a Service Provider IP NGN Environment | 24% | 1 Describe Multicast Concepts (multicast distribution trees, multicast routing protocols and IGMP operations) 2 Describe Any-source multicast (ASM) versus Source Specific Multicast (SSM) 3 Describe Intra Domain versus Inter Domain Multicast Routing 4 Describe the mapping of multicast IP addresses to MAC addresses 5 Describe and illustrate how RPF check can fail if the unicast and multicast topologies are non-congruent 6 Describe multiprotocol BGP functions in mroute distribution 7 Describe the principles and operations of PIM-SM 8 Describe multicast source discovery protocol (MSDP) operations 9 Describe methods used to secure multicast 10 Implement PIM-SM operations on IOS-XR and IOS-XE 11 Implement Auto-RP, PIMv2 BSR, Anycast RP on IOS-XR and IOS-XE 12 Implement Bi-Dir PIM operations in SP IP NGN environment on IOS-XR and IOS-XE 13 Implement SSM operations on IOS-XR and IOS-XE 14 Implement MSDP operations on IOS-XR and IOS-XE 15 Troubleshoot multicast routing IOS-XR and IOS-XE configurations errors in service provider environments |
| IPv6 in a Service Provider IP NGN Environment | 27% | 1 Describe DNS and DHCP operation in IPv6 2 Describe the fields that are used in the IPv6 header to support QoS functions 3 Describe Cisco IOS/IOS-XE and IOS-XR IPv6 network management and troubleshooting tools like traceroute/ping 4 Describe dual-stack implementations 5 Describe IPv6 tunneling mechanisms 6 Configure IPv6 multicast routing 7 Configure static IPv6-in-IPv4 tunnels on IOS-XR and IOS-XE 8 Configure dynamic 6to4 tunnels on IOS-XR and IOS-XE |
| High Availability Routing Features | 25% | 1 Implement NSF/NSR/Graceful Restart for BGP on IOS-XR and IOS-XE 2 Implement Bidirectional Forwarding Detection (BFD) for BGP on IOS-XR and IOS-XE 3 Implement high availability and optimization multicast routing features on IOS-XR and IOS-XE |
| BGP Routing Features in a Service Provider IP NGN Environment | 24% | 1 Describe the BGP routing processes in IOS-XR 2 Configure the BGP timers on IOS-XR and IOS-XE 3 Describe the need for BGP confederations in BGP transit backbones 4 Design and implement BGP route reflectors to scale IBGP in BGP transit backbones on IOS-XR and IOS-XE 5 Implement BGP in SP IP NGN IOS-XR and IOS-XE PE routers to support multi-homed BGP Customers 6 Implement Remote Triggered Blackhole Filtering (RTBF) on IOS-XR and IOS-XE 7 Implement BGP TTL security on IOS-XR and IOS-XE 8 Implement BGP maximum-prefix on IOS-XR and IOS-XE 9 Implement BGP route dampening on IOS-XR and IOS-XE 10 Troubleshoot BGP IOS-XR and IOS-XE configuration errors in service provider environments 11 Optimize BGP IOS-XR configurations using af-groups, session-groups, and neighbor-groups 12 Optimize BGP IOS-XE configurations using peer-groups |
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