« 返回题库列表思科350-501历年考试题解析｜思科真题风格练习+答案讲解
问题 #1
Which benefit is provided by FRR?
A. It provides performance data for the service provider network.
B. It provides rapid failure detection between forwarding engines.
C. It protects Cisco MPLS TE LSPs from link and node failures.
D. It provides fast forwarding path failure detection times for all medi
A.
问题 #2
An engineer must apply an 802.1ad-compliant configuration to a new switchport with these requirements: 1.The switchport must tag all traffic when it enters the port. 2.The switchport is expected to provide the same level of service to traffic from any cus
A. interface GigabitEthernet1/0/1 ethernet dot1ad uni s-port service instance 12 encapsulation default rewrite ingress tag push dot1ad 21 symmetric 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 switchport mode trunk switchport trunk encapsulation dot1q encapsulation ISL bridge-domain 12
D. interface GigabitEthernet1/0/1 ethernet dot1ad nni service instance 12 encapsulation dot1ad bridge-domain 12
问题 #3
What is a characteristic of MVPN?
A. It creates GRE tunnels to route multicast traffic over a service provider IP core.
B. It allows VRF traffic to use the service provider MPLS VPN to route multicast traffic.
C. It uses pseudowires to route unicast and broadcast traffic over either a service provider MPLS or IP core.
D. It bypasses the use of MPLS in the service provider core and transmits packets using IP only.
问题 #4
How does SR policy operate in Segment Routing Traffic Engineering?
A. An active SR policy installs a BSID-keyed entry in the forwarding table to steer the packets that match the entry to the SR policy SID-list.
B. An SR policy for color and endpoint is deactivated at the headend as soon as the headend learns a valid candidate path for the policy.
C. When a set of SID lists is associated with the SR policy designated path, traffic steering is ECMP-based according to the qualified cost of each SID-list.
D. When "invalidation drop" behavior occurs, the SR policy forwarding entry is removed and the router drops all traffic that is steered into the SR policy.
问题 #5
Which OS uses a distributed subsystem architecture?
A. CatOS
B. IOS XR
C. IOS XE
D. IOS
问题 #6
A new PE router is configured to run OSPF as an IGP with LDP on all interfaces. The engineer is trying to prevent black holes after convergence when the PE device loses an LDP session with other PE routers. Which action must the engineer take to implement
A. Configure the mpls ldp session protection and mpls label protocol ldp commands on the new PE router that connect to the CE routers.
B. Configure the new PE router with the mpls ldp session protection command on interfaces with directly connected neighbors.
C. Configure the new PE router with the mpls ldp session protection command and on neighboring routers that connect to this new PE router.
D. Configure the mpls ldp discovery targeted-hello accept and mpls ldp session protection commands on the interfaces on the new PE router that connect to the CE routers.
问题 #7
An engineer must implement QoS to prioritize traffic that requires better service throughout the network. The engineer started by configuring a class map to identify the high-priority traffic. Which additional tasks must the engineer perform to implement
A. Attach the class map to a policy map that designates the action to be taken on the classified traffic and then attach the policy map to an interface using a service policy.
B. Attach the class map to a policy map that sets the minimum bandwidth allocated to the classified traffic and designates the action to be taken on the traffic.
C. Attach the class map to a policy map within a VRF to segregate the high-priority traffic and then attach the policy map to an interface in another VRF.
D. Create a route map to manipulate the routes that are entered into the routing table and then attach the route map to an interface using a service policy.
问题 #8
How does Inter-AS Option-A function when two PE routers in different autonomous systems are directly connected?
A. The two routers establish an MP-EBGP session to share their customers' respective VPNv4 routes.
B. The two routers share all Inter-AS VPNv4 routes and redistribute routes within an IBGP session to provide end-to-end reachability.
C. The two routers share VPNv4 routes over a multihop EBGP session and set up an Inter-AS tunnel using one another's label.
D. The two routers treat one another as CE routers and advertise unlabeled IPv4 routes through an EBGP session.
问题 #9
A network engineer is testing an automation platform that interacts with Cisco networking devices via NETCONF over SSH. In accordance with internal security requirements: 1.NETCONF sessions are permitted only from trusted sources in the 172.16.20.0/24 sub
A. configure terminal hostname R1 ip domain-name mydomain.com crypto key generate rsa ip ssh version 2 access-list 1 permit 172.16.20.0 0.0.0.255 netconf ssh acl 1 line vty 0 4 transport input ssh end
B. configure terminal hostname R1 ip domain-name mydomain.com crypto key generate rsa ip ssh version 2 access-list 1 permit 172.16.20.0 0.0.0.255 access-list 1 permit any netconf ssh line vty 0 4 access-class 1 in transport input ssh end
C. configure terminal hostname R1 ip domain-name mydomain.com crypto key generate rsa ip ssh version 1 access-list 1 permit 172.16.20.0 0.0.0.255 access-list 2 permit any netconf ssh line vty 0 4 access-class 2 in transport input ssh end
D. configure terminal hostname R1 ip domain-name mydomain.com crypto key generate rsa ip ssh version 1 access-list 1 permit 172.16.20.0 0.0.0.255 netconf ssh acl 1 line vty 0 4 transport input ssh end
问题 #10
What occurs when a high bandwidth multicast stream is sent over an MVPN using Cisco hardware?
A. A data and default MDT are created to flood the multicast stream out of all PIM-SM neighbors.
B. The traffic uses the default MDT to transmit the data only if it is a (S, G) multicast route entry.
C. A data MDT is created if it is a (*, G) multicast route entry.
D. A data MDT is created to allow for the best transmission through the core for (S, G) multicast route entries.
问题 #11
Which condition must be met for TI-LFA to protect LDP traffic?
A. The protected destination must have an associated LDP label and prefix-SID.
B. For single-segment protection, the PQ node must be LDP and SR-capable.
C. For double-segment protection, the P and Q nodes must be SR-capable.
D. The point of local repair must be LDP-capable.
问题 #12
After troubleshooting multiple outages on the network due to repeated configuration errors, the network architect asked an engineer to enable NETCONF to facilitate future configurations. The configuration must enable syslog messaging to record NETCONF not
A. username ciscotesttaker privilege 15 password 0 ciscotest aaa new-model aaa authorization exec default local snmp-server community ciscotest RW netconf-yang cisco-ia snmp-community-string ciscotest logging history warnings
B. netconf-yang username ciscotesttaker privilege 15 password 0 ciscotest aaa new-model aaa authorization exec default local snmp-server community ciscotest RW netconf-yang cisco-ia snmp-community-string ciscotest logging history debugging
C. username ciscotesttaker privilege 15 password 0 ciscotest aaa new-model aaa authorization exec default local snmp-server community ciscotest RW netconf-yang cisco logging history critical
D. netconf-yang username ciscotesttaker privilege 15 password 0 ciscotest snmp-server community ciscotest RW netconf-yang cisco-ia snmp-community-string ciscotest logging history informational
问题 #13
After a series of unexpected device failures on the network, a Cisco engineer is deploying NSF on the network devices so that packets continue to be forwarded during switchovers. The network devices reside in the same building, but they are physically sep
A. Implement VRFs and specify the forwarding instances that must remain active during failover.
B. Implement OSPF to maintain the link-state database during failover.
C. Implement Cisco Express Forwarding to provide forwarding during failover.
D. Implement an L2VPN with the failover peer to share state information between the active and standby devices.
问题 #14
What is a feature of model-driven telemetry?
A. It uses the pull model to send requested data to a client when polled.
B. It uses the push model to stream data to desired destinations.
C. It is less secure because it uses community strings.
D. It occasionally streams to multiple servers in the network.
问题 #15
What is a characteristic of the YANG model?
A. Associated types are optional for each leaf.
B. It uses containers to categorize related nodes.
C. It is a distributed model of nodes.
D. Spines are used to represent individual attributes of nodes.
问题 #16
An ISP is implementing end-to-end fault monitoring for a customer based on the IEEE 802.3ah standard. The solution must detect when 15 or more corrupted Ethernet packets arrive within 10 ms and stop propagating traffic through the ISP backbone network or
A. ethernet oam link-monitoring ethernet oam link-monitor receive-crc window 15 ethernet oam link-monitor receive-crc threshold high 10 ethernet oam link-monitor high-threshold action disable-interface
B. ethernet oam ethernet oam link-monitor receive-crc window 10 ethernet oam link-monitor receive-crc threshold high 15 ethernet oam link-monitor transmit-crc window 10 ethernet oam link-monitor transmit-crc threshold high 15 ethernet oam link-monitor high-threshold action errordisable-interface
C. ethernet oam link-monitoring enable ethernet oam link-monitor crc-errors ingress time-window 10 ethernet oam link-monitor crc-errors ingress threshold high 15 ethernet oam link-monitor crc-errors egress time-window 10 ethernet oam link-monitor crc-errors egress threshold high 15 ethernet oam link-monitor high-threshold action shutdown-interface
D. ethernet oam link-monitoring global enable ethernet oam link-monitor receive crc-errors period 15 ethernet oam link-monitor receive crc-errors limit 15 ethernet oam link-monitor transmit crc-errors period 10 ethernet oam link-monitor transmit crc-errors limit 15 ethernet oam link-monitor limit action error-disable interface
问题 #17
What is one of the differences between Ansible and Chef?
A. Ansible uses YAML and Chef uses Ruby.
B. Ansible uses Ruby and Chef uses Python.
C. Chef is highly scalable and Ansible is highly secure.
D. Chef requires the use of Windows in the environment and Ansible requires Linux.
问题 #18
The NOC team must update the BGP forwarding configuration on the network with these requirements: 1.BGP peers must establish a neighborship with NSF capability and restart the session for the capability to be exchanged after 120 seconds. 2.BGP peers must
A. Set the BGP restart-time to 120 seconds and the BGP ha-mode sso to 360 seconds.
B. Set the BGP restart-time to 120 seconds and the stalepath-time to 360 seconds.
C. Set the stalepath-time to 120 seconds and the BGP restart-time to 360 seconds.
D. Set the BGP ha-mode sso to 120 seconds and the BGP restart-time to 360 seconds.
问题 #19
In an EVPN operation, how does the PE determine and advertise Ethernet segment reachability?
A. The PE discovers the remote PEs in the EVI and builds a flood list linked with the EVI.
B. The PE discovers other PEs in the same Ethernet segment and elects a DF.
C. The PE discovers and shares routing information for the B-MAC addresses associated with local Ethernet segments.
D. The PE discovers remote ESIs and determines their redundancy mode.
问题 #20
Which programmable API allows the service provider to plan and optimize the automation of network operations and achieve closed-loop operations?
A. Crosswork Network Automation
B. WAN Automation Engine
C. Evolved Programmable Network Manager
D. Network Services Orchestrator
问题 #21
Which core component of MDT describes the data that an MDT-capable device streams to a collector?
A. subscription
B. encoder
C. sensor path
D. transport protocol
问题 #22
A customer site is being connected to a Frame Relay network via a T1 link. The customer has a contract for 512 kbps service with a Tc value of 125 ms. Under peak line conditions, customer traffic can reach four times the contracted speed. Which QoS config
A. policy-map policy_map class class_map police cir 512000 bc 64000 pir 2048000 be 192000 conform-action transmit exceed-action drop
B. policy-map policy_map class class_map police cir 512000 bc 32000 pir 64000 be 6400 conform-action transmit violate-action set-dscp-transmit default exceed-action drop
C. policy-map policy_map class class_map police cir 512000 bc 128000 pir 256000 be 32000 conform-action transmit exceed-action set-be-bit transmit exceed-action drop
D. policy-map policy_map class class_map police cir 512kbps bc 256kbps pir 2Mbps be 9600kbps conform-action transmit exceed-action set-de-bit transmit violate-action drop
问题 #23
What is the purpose of RSVP tear messages?
A. to confirm successful end-to-end resource allocation
B. to inform the headend router of LSP issues
C. to reuse router resources for other reservation requests
D. to notify the tail-end router of resource unavailability on the transit router
问题 #24
Why is the keyword none needed when implementing management plane security using TACACS+?
A. It allows the local database to authenticate when the TACACS+ server is unreachable.
B. It allows the router to query a RADIUS server when the TACACS+ server is unreachable.
C. It allows authentication to succeed when the TACACS+ server is unreachable.
D. It prevents all users from accessing router 1 unless the TACACS+ server is reachable.
问题 #25
A network operator must implement a PIM-SSM multicast configuration on the customer's network so that users in different domains are able to access and stream live traffic. The IGMP version must be enabled to support the SSM implementation. Which action m
A. R1 (config)# ip multicast-routing R1 (config)# ip pim ssm default R1 (config)# interface ethernet 1/0 R1 (config-if)# ip pim sparse-mode R1 (config-if)# ip igmp version 3
B. R1 (config)# ip pim ssm range 1 R1 (config)# interface ethernet 1/0 R1 (config-if)# ip pim sparse-dense-mode R1 (config-if)# ip igmp version 2
C. R1 (config)# ip pim bidir-enable R1 (config)# ip multicast-routing R1 (config)# ip pim autorp listener R1 (config-if)# ip igmp version 2
D. R1 (config)# ip routing multicast R1 (config)# ip pim ssm range 1 R1 (config)# ip pim passive R1 (config)# ip pim dense-mode R1 (config-if)# ip igmp version 3
问题 #26
The NOC engineer in a service provider network must configure an SNMP community on switch SW with these security attributes: 1.Event messages must be authenticated with the MD5 algorithm and encrypted. 2.The remote user name for the SNMP server at 172.16.
A. SW(config)# snmp-server group group2 v3 auth SW(config)# snmp-server user AuthNocUser group2 remote 172.16.10.1 v3 auth md5 password1
B. SW(config)# snmp-server community comaccess ro 4 SW(config)# snmp-server enable traps snmp authentication SW(config)# snmp-server host cisco.com version 2c public
C. SW(config)# snmp-server group group1 v3 noauth SW(config)# snmp-server user AuthNocUser group1 remote 172.16.10.1 SW(config)# snmp-server host 172.16.10.1 informs version 3 noauth remoteuser config
D. SW(config)# snmp-server group group3 v3 priv SW(config)# snmp-server user AuthNocUser group3 remote 172.16.10.1 v3 auth md5 Cisco@123 priv des 56
问题 #27
Which role does the Adjacency-SID sub-TLV extension perform in the IS-IS routing protocol?
A. It is advertised within TLV-22 (Extended IS Reachability) to label a specific link in a segment routing domain.
B. It is advertised within TLV-24 (IS-IS Neighbor Adjacency Attribute) to label a specific adjacency between Level 1 routers within one IS-IS are
A.
C. It is advertised within TLV-145 (IS-IS Prefix Reachability Information) to label host prefixes on loopback interfaces on Level 2 routers within one IS-IS are
A.
D. It is advertised within TLV-136 (Extended IP Reachability) to label a specific node in the network.
问题 #28
Which capability does the MPLS TE FRR facility backup protection method provide?
A. assigning a backup TE LSP tunnel to the protected node at the headend of the protected TE LSP
B. defining the set of characteristics for the backup TE LSP
C. leveraging label stacking to protect selected TE LSPs using a single backup TE LSP
D. creating a bypass LSP for each protected LSP at each point of local repair
问题 #29
What is an enhancement that Cisco IOS XE Software has over Cisco IOS Software?
A. It is built on a QNX Neutrino Microkernel.
B. It supports symmetric multiprocessing.
C. It allows all processes to use the same pool of memory.
D. It runs on a 32-bit operating system.
问题 #30
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 great
A. Redistribute the IGP prefixes into another IGP to ensure end-to-end LSPs.
B. 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.
C. Configure the ABR routers as route reflectors that redistribute IGP into BGP.
D. Redistribute the IGP prefixes from one IGP into the other IGP to ensure end-to-end LSPs.
问题 #31
How does Cisco DNA Center enhance network automation?
A. It allows network administrators to combine voice and data networks into a single topology without manual configuration.
B. It allows network administrators to reduce the number of VRFs in a multicustomer environment by automatically implementing a single VLAN per customer.
C. It allows network administrators to quickly deploy Cisco Layer 2 devices without requiring STP and broadcast transport.
D. It allows network administrators to reduce inconsistencies when they deploy and validate network configurations.
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