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Q171. Which three actions are required when configuring NAT-PT? (Choose three.)
A. Enable NAT-PT globally.
B. Specify an IPv4-to-IPv6 translation.
C. Specify an IPv6-to-IPv4 translation.
D. Specify a ::/96 prefix that will map to an IPv4 address.
E. Specify a ::/48 prefix that will map to a MAC address.
F. Specify a ::/32 prefix that will map to an IPv6 address.
The detailed steps on configuring NAY-PT is found at the reference link below:
Reference: http://www.cisco.com/c/en/us/td/docs/ios/ipv6/configuration/guide/12_4t/ipv6_12_4t_book/i p6-nat_trnsln.html
Q172. Which two statements about Cisco Performance Routing are true? (Choose two.)
A. It analyzes application performance to make routing decisions.
B. When determining the best path, it prefers the shortest path.
C. It can help the administrator determine the need for bandwidth upgrades.
D. It operates entirely in the data plane.
E. It can use EIGRP feasible successors to determine an alternate path.
F. It analyzes system hardware performance to make routing decisions.
Q173. Which EIGRP configuration results in subsecond failover outside of the basic routing
A. bfd all-interfaces
B. timers active-time disabled
C. timers active-time 1
D. timers nsf route-hold 20
Q174. What are two advantages to using Asynchronous mode instead of Demand mode for BFD? (Choose two.)
A. Asynchronous mode requires half as many packets as Demand mode for failure detection.
B. Asynchronous mode can be used in place of the echo function.
C. Asynchronous mode supports a larger number of BFD sessions.
D. Asynchronous mode requires one fourth as many packets as Demand mode for failure detection.
E. Asynchronous mode’s round-trip jitter is less than that of Demand mode.
Pure Asynchronous mode is advantageous in that it requires half as many packets to achieve a particular Detection Time as does the Echo function. It is also used when the Echo function cannot be supported for some reason.
Q175. Which statement is true about LLDP?
A. LLDP provides VTP support.
B. LLDP does not use a multicast address to communicate.
C. LLDP can indicate only the duplex setting of a link, and not the speed capabilities.
D. LLDP does not support native VLAN indication.
Cisco Discovery Protocol Versus LLDP-MED TLV Comparison
Cisco Discovery Protocol TLV
Native VLAN support-Indicates the native VLAN
Native VLAN TLV
Reference: http://www.cisco.com/en/US/technologies/tk652/tk701/technologies_white_paper0900aecd 804cd46d.html
Q176. Refer to the exhibit.
R2 is unable to access the 172.16.1.0/30 network between R1 and R3. Which option is a possible reason for the failure?
A. The seed metric for redistributing into RIP on R3 is missing.
B. The OSPF processes on R2 and R3 are different.
C. Auto-summary is misconfigured under the RIP process of R3.
D. The subnet mask on the link between R2 and R3 is smaller than /30.
E. The wildcard mask on R3 is misconfigured.
The problem is that RIP requires a seed metric to be specified when redistributing routes into that protocol. A seed metric is a "starter metric" that gives the RIP process a metric it can work with. The OSPF metric of cost is incomprehensible to RIP, since RIP's sole metric is hop count.
Reference: http://www.thebryantadvantage.com/CCNP%20Certification%20BSCI%20Exam%20Tutoria l%20Route%20Redistribution%20Seed%20Metric.htm
Q177. Which three statements about EIGRP and BFD are true? (Choose three.)
A. BFD is independent of the routing protocol, so it can be used as a generic failure detection mechanism for EIGRP.
B. Some parts of BFD can be distributed to the data plane, so it can be less CPU-intensive than reduced timers, which exist wholly at the control plane.
C. Reduced EIGRP timers have an absolute minimum detection timer of 1-2 seconds; BFD can provide sub-second failure detection.
D. BFD is tied to specific routing protocols and can be used for generic fault detection for the OSPF, EIGRP, and BGP routing protocols.
E. BFD is dependent on the EIGRP routing protocol, so it can be used as a specific failure detection mechanism.
F. BFD resides on the control plane, so it is less CPU-intensive than if it resided on the data plane.
There are several advantages to implementing BFD over reduced timer mechanisms for routing protocols:
. Although reducing the EIGRP, IS-IS, and OSPF timers can result in minimum detection timer of one to two seconds, BFD can provide failure detection in less than one second.
. Because BFD is not tied to any particular routing protocol, it can be used as a generic and consistent failure detection mechanism for EIGRP, IS-IS, and OSPF.
. Because some parts of BFD can be distributed to the data plane, it can be less CPU-intensive than the reduced EIGRP, IS-IS, and OSPF timers, which exist wholly at the control plane.
Q178. Which two options are reasons to manipulate the delay metric instead of the bandwidth metric for EIGRP routing? (Choose two.)
A. Because the delay metric provides better handling for bursty traffic
B. Because manipulating the bandwidth metric can also affect QoS
C. Because manipulating the bandwidth affects only a particular path
D. Because changes to the delay metric are propagated to all neighbors on a segment
Using the bandwidth to influence EIGRP paths is discouraged for two reasons:
. Changing the bandwidth can have impact beyond affecting the EIGRP metrics. For example, quality of service (QoS) also looks at the bandwidth on an interface.
. EIGRP throttles to use 50 percent of the configured bandwidth. Lowering the bandwidth can cause problems like staving EIGRP neighbors from getting hello packets because of the throttling back.
Because changes to the delay metric are propagated to all downstream routers, changing the interface delay parameter is the preferred method of influencing path selection
Q179. Which two statements about SoO checking in EIGRP OTP deployments are true? (Choose two).
A. During the import process, the SoO value in BGP is checked against the SoO value of the site map.
B. During the reception of an EIGRP update, the SoO value in the EIGRP update is checked against the SoO value of the site map on the ingress interface.
C. At the ingress of the PE/CE link, the SoO in the EIGRP update is checked against the SoO within the PE/CE routing protocol.
D. At the egress of the PE/CE link, the SoO is checked against the SoO within the PE/CE routing protocol.
E. The SoO is checked at the ingress of the backdoor link.
F. The SoO is checked at the egress of the backdoor link.
. SoO checking:
– During the import process the SoO value in BGP update is checked against the SoO value of the site-map attached to VRF interface. The update is propagated to CE only if there is no match (this check is done regardless of protocol used on PE/CE link).
– At reception of EIGRP update, the SoO value in the EIGRP update is checked against the SoO value of site-map attached to the incoming interface. This update is accepted only if there is no match (this check can optionally be done on backdoor router).
Q180. Which two statements describe characteristics of HDLC on Cisco routers? (Choose two.)
A. It supports multiple Layer 3 protocols.
B. It supports multiplexing.
C. It supports only synchronous interfaces.
D. It supports authentication.
Cisco High-Level Data Link Controller (HDLC) is the Cisco proprietary protocol for sending data over synchronous serial links using HDLC. Cisco HDLC also provides a simple control protocol called Serial Line Address Resolution Protocol (SLARP) to maintain serial link keepalives. Cisco HDLC is the default for data encapsulation at Layer 2 (data link) of the Open System Interconnection (OSI) stack for efficient packet delineation and error control. The absence of a protocol type field in the HDLC header posed a problem for links that carried traffic from more than one Layer 3 protocol. Cisco, therefore, added an extra Type field to the HDLC header, creating a Cisco-specific version of HDLC. Cisco routers can support multiple network layer protocols on the same HDLC link. For example an HDLC link between two Cisco routers can forward both IPv4 and IPv6 packets because the Type field can identify which type of packet is carried inside each HDLC frame.