Free 350-501 Sample Questions — Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR)

A network administrator is planning a new network with a segment-routing architecture using a distributed control plane. How is routing information distributed on such a network?

• A. Each segment is signaled by a compatible routing protocol, and each segment makes its own steering decisions based on SR policy
• B. Each segment is signaled by MPLS, and each segment makes steering decisions based on the routing policy pushed by BGP
• C. Each segment is signaled by an SR controller, but each segment makes its own steering decisions based on SR policy
• D. Each segment is signaled by an SR controller that makes the steering decisions for each node

Which technology enables the addition of new wavelengths in a fiber-optic network?

• A. IPoDWDM
• B. CWDM
• C. DWDM
• D. ROADM

What should a network engineer consider before implementing segment routing?

• A. It is an MPLS-based routing technique
• B. It is a multicast-based routing technique
• C. It is a destination-based routing technique
• D. It is a source-based routing technique

What is the primary role of a BR router in a 6rd environment?

• A. It provides connectivity between end devices and the IPv4 network
• B. It provides IPv4-in-IPv6 encapsulation
• C. It connects the CE routers with the IPv6 network
• D. It embeds the IPv4 address in the 2002::/16 prefix

What are two features of stateful NAT64? (Choose two.)

• A. It uses address overloading
• B. It provides 1:N translations, so it supports an unlimited number of endpoints
• C. It requires IPv4-translatable IPv6 address assignments
• D. It requires the IPv6 hosts to use either DHCPv6-based address assignments or manual address assignments
• E. It provides 1:1 translation, so it supports a limited number of endpoints

Under which circumstance does BGP ignore the best-path algorithm after receiving multiple routes to a destination?

• A. when the routes have local-preference values less than 100
• B. when the route’s first hop has a different AS number
• C. when the route’s next hop is unreachable
• D. when the routes are synchronized

What is a characteristic of MVPN?

• A. It bypasses the use of MPLS in the service provider core and transmits packets using IP only
• B. It uses pseudowires to route unicast and broadcast traffic over either a service provider MPLS or IP core
• C. It allows VRF traffic to use the service provider MPLS VPN to route multicast traffic
• D. It creates GRE tunnels to route multicast traffic over a service provider IP core

After you analyze your network environment, you decide to implement a full separation model for Internet access and MPLS L3VPN services. For which reason do you make this decision?

• A. It enables EGP and IGP to operate independently
• B. It enables you to choose whether to separate or centralize each individual service
• C. It is easier to manage a system in which services are mixed
• D. It requires only one edge router

An engineer must apply an 802.1ad-compliant configuration to a new switchport with these requirements: ✑ The switchport must tag all traffic when it enters the port. ✑ The switchport is expected to provide the same level of service to traffic from any customer VLAN. Which configuration must the engineer use?

• A. interface GigabitEthernet1/0/1 switchport mode trunk switchport trunk encapsulation dot1q encapsulation ISL bridge-domain 12
• B. interface GigabitEthernet1/0/1 ethernet dot1ad uni c-port service instance 12 encapsulation dot1q rewrite ingress tag push dot1ad 21 symmetric bridge-domain 12
• C. interface GigabitEthernet1/0/1 ethernet dot1ad uni s-port service instance 12 encapsulation default rewrite ingress tag push dot1ad 21 symmetric bridge-domain 12
• D. interface GigabitEthernet1/0/1 ethernet dot1ad nni service instance 12 encapsulation dot1ad bridge-domain 12

You are creating new Cisco MPLS TE tunnels. Which type of RSVP message does the headend router send to reserve bandwidth on the path to the tailend router?

• A. path
• B. tear
• C. error
• D. reservation

How can shared services in an MPLS Layer 3 VPN provide Internet access to the Customers of a central service provider?

• A. Static routes on CE routers allow route leakage from a PE global routing table
• B. The CE router can establish a BGP peering to a PE router and use the PE device to reach the Internet
• C. The customer VRF uses route targets to import and export routes to and from a shared services VRF
• D. Route distinguishers are used to identify the routes that CEs can use to reach the Internet

An engineering team must implement Unified MPLS to scale an MPLS network. Devices in the core layer use different IGPs, so the team decided to split the network into different areas. The team plans to keep the MPLS services as they are and introduce greater scalability. Which additional action must the engineers take to implement the Unified MPLS?

• A. Redistribute the IGP prefixes from one IGP into the other routers to ensure end-to-end LSPs
• B. Configure the ABR routers as route reflectors that redistribute IGP into BGP
• C. Redistribute the IGP prefixes into another IGP to ensure end-to-end LSPs
• D. Move the IGP prefixes into IS-IS as the loopback prefixes of the PE routers to distribute the prefixes to other routers to create end-to-end LSPs

A network engineer must implement an ACL-based solution to mitigate availability issues on a web service that is hosted on a server at IP address 172.16.15.18/23. Access to the web server should be allowed over HTTP from RFC 1918 addresses only. The network architect has already enabled PMTUD in the network. Which ACL configuration must the engineer implement to complete the task?

• A. access-list 199 deny ip any host 172.16.15.18 tcp-fragments access-list 199 permit tcp 10.0.0.0 255.255.255.255 172.16.15.18 0.254.0.255 eq 80 access-list 199 permit tcp 172.16.0.0 0.0.255.255 172.16.15.18 0.0.254.255 eq 80 access-list 199 permit tcp 192.168.0.0 0.0.0.255 172.16.15.18 0.0.254.255 eq 80 access-list 199 deny ip any any
• B. access-list 199 deny tcp any host 172.16.15.18 http-fragments access-list 199 permit 16 10.10.0.0 0.255.255.255 172.16.15.18 0.0.2.253 eq 80 access-list 199 permit 16 172.16.0.0 0.0.255.255 172.16.15.18 0.0.2.253 eq 80 access-list 199 permit 16 192.168.0.0 0.0.0.255 172.16.15.18 0.0.2.253 eq 80 access-list 199 deny tcp any any
• C. access-list 198 deny ip any host 172.16.15.18 ip-fragments access-list 198 permit 18 10.10.0.0 255.255.255.0 172.16.15.18 255.255.254.0 access-list 198 permit 18 172.16.0.0 255.255.0.0 172.16.15.18 255.255.254.0 access-list 198 permit 18 192.168.0.0 255.255.255.0 172.16.15.18 255.255.254.0 access-list 198 deny tcp any any
• D. access-list 198 deny ip any host 172.16.15.18 fragments access-list 198 permit 6 10.0.0.0 0.255.255.255 172.16.15.18 0.0.1.255 eq 80 access-list 198 permit 6 172.16.0.0 0.0.255.255 172.16.15.18 0.0.1.255 eq 80 access-list 198 permit 6 192.168.0.0 0.0.0.255 172.16.15.18 0.0.1.255 eq 80 access-list 198 deny ip any any

What are two characteristics of MPLS TE tunnels? (Choose two.)

• A. They are unidirectional
• B. The headend and tailend routers of the tunnel must have a BGP relationship
• C. They are run over Ethernet cores only
• D. They use RSVP to provide bandwidth for the tunnel
• E. They require EIGRP to be running in the core

An engineer is implementing a route map to support redistribution within BGP. The route map must be configured to permit all unmatched routes. Which action must the engineer perform to complete this task?

• A. Include a permit statement as the first entry
• B. Remove the implicit deny entry
• C. Include at least one explicit deny statement
• D. Include a permit statement as the last entry

Which programmable API allows the service provider to plan and optimize the automation of network operations and achieve dosed-loop operations?

• A. Network Services Orchestrator
• B. WAN Automation Engine
• C. Crosswork Network Automation
• D. Evolved Programmable Network Manager

An engineer working for telecommunication company needs to secure the LAN network using a prefix list. Which best practice should the engineer follow when he implements a prefix list?

• A. An engineer must identify the prefix list with a number only
• B. The final entry in a prefix list must be /32
• C. An engineer must include only the prefixes for which he needs to log activity
• D. An engineer must use nonsequential sequence numbers in the prefix list so that he can insert additional entries later

What is the difference between SNMP and model-driven telemetry?

• A. SNMP uses the YANG data modeling language
• B. Telemetry uses traps and inform messages to deliver data to a network administrator on a polling basis
• C. Telemetry allows for modeled network data to be pushed to the network administrator on an as-needed basis
• D. SNMP pushes network data to the network administrator whenever it is queried

What does DWDM use to combine multiple optical signals?

• A. IP protocols
• B. wavelength
• C. time slots
• D. frequency

A network architect plans to implement MPLS OAM to provide additional troubleshooting functionality for the NOC team. After analyzing the configuration on the MPLS P/PE nodes, the architect decides to revise the CoPP policies. Which two actions ensure that the new solution is secure? (Choose two.)

• A. Allow port 3505 in the outbound direction only
• B. Allow the ICMP protocol only
• C. Allow the TCP and UDP protocols
• D. Allow the UDP protocol only
• E. Allow port 3503 in the inbound direction only