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Exam Code: 400-101
Exam Name: CCIE Routing and Switching (v5.0)
Questions Ask for 400 101 vce
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Q321. Which statement about Cisco Discovery Protocol is true?
A. The multicast address 0100.0cdd.dddd is used as the destination address for periodic advertisements.
B. An inactive VLAN that is configured on an access port passes periodic Cisco Discovery Protocol advertisements.
C. The multicast address 0100.0ccc.ccd is used as the destination address for periodic advertisements.
D. A VLAN must be active on an access port before periodic Cisco Discovery Protocol advertisements are passed.
All CDP packets include a VLAN ID. If you configure CDP on a Layer 2 access port, the CDP packets sent from that access port include the access port VLAN ID. If you configure CDP on a Layer 2 trunk port, the CDP packets sent from that trunk port include the lowest configured VLAN ID allowed on that trunk port. CDP messages on the active physical interfaces (Ethernet NIC) to a well-known multicast address (0100.0CCC.CCCC.
Q322. DRAG DROP
Drag and drop the events on the left to dispaly the correct sequence on the right when CoPP is enabled.
Q323. Which two statements about NPTv6 are true? (Choose two.)
A. The translation is invisible to applications that hard code IP information within the application logic.
B. It is a one-way stateful translation for the IPv6 address.
C. Translation is 1:1 at the network layer.
D. It is a two-way stateless translation for the network prefix.
This document describes a stateless, transport-agnostic IPv6-to-IPv6 Network Prefix Translation (NPTv6) function that provides the address-independence benefit associated with IPv4-to-IPv4 NAT (NAPT44) and provides a 1:1 relationship between addresses in the "inside" and "outside" prefixes, preserving end-to-end reachability at the network layer NPTv6 Translation is stateless, so a "reset" or brief outage of an NPTv6 Translator does not break connections that traverse the translation function, and if multiple NPTv6 Translators exist between the same two networks, the load can shift or be dynamically load shared among them. NPTv6 is defined to include a two-way, checksum-neutral, algorithmic translation function, and nothing else.
Q324. Which two statements about IBGP multipath are true? (Choose two.)
A. The IGP metric of the BGP next hop can be different from the best-path IGP metric if you configure the router for unequal-cost IBGP multipath.
B. The IGP metric of the BGP next hop must be the same as the best-path IGP metric.
C. The equivalent next-hop-self is performed on the best path from among the IBGP multipaths before it is forwarded to external peers.
D. The path should be learned from an external neighbor.
E. The router BGP process must learn the path from a confederation-external or external neighbor.
F. The router BGP process must learn the path from an internal neighbor.
Q325. Refer to the exhibit.
Which two statements about how the configuration processes Telnet traffic are true? (Choose two.)
A. Telnet traffic from 10.1.1.9 to 10.10.10.1 is dropped.
B. All Telnet traffic is dropped.
C. Telnet traffic from 10.10.10.1 to 10.1.1.9 is permitted.
D. Telnet traffic from 10.1.1.9 to 10.10.10.1 is permitted.
E. Telnet traffic is permitted to all IP addresses.
The ACL applied to the COPP policy matches only telnet traffic from 10.1.1.9 to 10.10.10.1, all other telnet traffic is not matched and therefore not used in the COPP policy, which means this traffic will be handled normally (accepted). For telnet traffic from 10.1.1.9 to 10.10.10.1, the COPP policy has defined this traffic as an exceed, and dropped.
Q326. Under which condition does UDP dominance occur?
A. when TCP traffic is in the same class as UDP
B. when UDP flows are assigned a lower priority queue
C. when WRED is enabled
D. when ACLs are in place to block TCP traffic
Q327. Which statement about the OSPF Loop-Free Alternate feature is true?
A. It is supported on routers that are configured with virtual links.
B. It is supported in VRF OSPF instances.
C. It is supported when a traffic engineering tunnel interface is protected.
D. It is supported when traffic can be redirected to a primary neighbor.
Restrictions for OSPF IPv4 Remote Loop-Free Alternate IP Fast Reroute
. The OSPF IPv4 Remote Loop-Free Alternate IP Fast Reroute feature is not supported on devices that are virtual links headends.
. The feature is supported only in global VPN routing and forwarding (VRF) OSPF
. The only supported tunneling method is MPLS.
. You cannot configure a traffic engineering (TE) tunnel interface as a protected interface. Use the MPLS Traffic Engineering—Fast Reroute Link and Node Protection feature to protect these tunnels. For more information, see the “MPLS Traffic Engineering—Fast Reroute Link and Node Protection” section in the Multiprotocol Label Switching Configuration Guide.
. You can configure a TE tunnel interface in a repair path, but OSPF will not verify the tunnel’s placement; you must ensure that it is not crossing the physical interface that it is intended to protect.
. Not all routes can have repair paths. Multipath primary routes might have repair paths for all, some, or no primary paths, depending on the network topology, the connectivity of the computing router, and the attributes required of repair paths.
. Devices that can be selected as tunnel termination points must have a /32 address advertised in the area in which remote LFA is enabled. This address will be used as a tunnel termination IP. If the device does not advertise a /32 address, it may not be used for remote LFA tunnel termination.
. All devices in the network that can be selected as tunnel termination points must be configured to accept targeted LDP sessions using the mpls ldp discovery targeted-hello accept command.
Q328. Which two routing protocols are not directly supported by Cisco PfR route control, and rely on the Cisco PfR subfeature PIRO? (Choose two.)
C. Static routing
Protocol Independent Route Optimization (PIRO) introduced the ability of Performance Routing (PfR) to search for a parent route—an exact matching route, or a less specific route—in the IP Routing Information Base (RIB), allowing PfR to be deployed in any IP-routed environment including Interior Gateway Protocols (IGPs) such as OSPF and IS-IS.
Q329. Refer to the exhibit.
Assume that Cisco Discovery Protocol is supported and enabled only on switches A and C.
Which information is returned when you issue the command show cdp neighbors on switch C?
A. a limited amount of information about switch B
B. neighbor details for switch A
C. neighbor details for switch B
D. neighbor details for switch C
Q330. Which three statements are true about OSPFv3? (Choose three.)
A. The only method to enable OSPFv3 on an interface is via the interface configuration mode.
B. Multiple instances of OSPFv3 can be enabled on a single link.
C. There are two methods to enable OSPFv3 on an interface, either via the interface configuration mode or via the router configuration mode.
D. For OSPFv3 to function, IPv6 unicast routing must be enabled.
E. For OSPFv3 to function, IPv6 must be enabled on the interface.
F. Only one instance of OSPFv3 can be enabled on a single link.
Here is a list of the differences between OSPFv2 and OSPFv3:
They use different address families (OSPFv2 is for IPv4-only, OSPFv3 can be used for IPv6-only or both protocols (more on this following))
OSPFv3 introduces new LSA types
OSPFv3 has different packet format
OSPFv3 uses different flooding scope bits (U/S2/S1)
OSPFv3 adjacencies are formed over link-local IPv6 communications
OSPFv3 runs per-link rather than per-subnet
OSPFv3 supports multiple instances on a single link, Interfaces can have multiple IPv6 addresses
OSPFv3 uses multicast addresses FF02::5 (all OSPF routers), FF02::6 (all OSPF DRs)
OSPFv3 Neighbor Authentication done with IPsec (AH)
OSPFv2 Router ID (RID) must be manually configured, still a 32-bit number
Following is a simple example of OSPFv3 configuration on a Cisco IOS 12.4T router.
interface GigabitEthernet 0/0
description Area 0.0.0.0 backbone interface
ipv6 address 2001:DB8:100:1::1/64
ipv6 ospf network broadcast
ipv6 ospf 100 area 0.0.0.0
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