★ Pass on Your First TRY ★ 100% Money Back Guarantee ★ Realistic Practice Exam Questions
Free Instant Download NEW 400-101 Exam Dumps (PDF & VCE):
Available on:
https://www.certleader.com/400-101-dumps.html
We are proud of our high-quality and excellent value Cisco Cisco practice materials. Because we have got high passing rate since we commenced. Most of our customers possess got through the Cisco 400-101 true test and also made remarkable achievements. Thus we assure that you will also help to make wonderful success as long as you consider full benefit from Actualtests Cisco certification simulated tests.
2021 Nov 400-101 ccie written exam price:
Q391. Which statement describes the function of rekey messages?
A. They prevent unencrypted traffic from passing through a group member before registration.
B. They refresh IPsec SAs when the key is about to expire.
C. They trigger a rekey from the server when configuring the rekey ACL.
D. They authenticate traffic passing through a particular group member.
Answer: B
Explanation:
Rekey messages are used to refresh IPsec SAs. When the IPsec SAs or the rekey SAs are about to expire, one single rekey message for a particular group is generated on the key server. No new IKE sessions are created for the rekey message distribution. The rekey messages are distributed by the key server over an existing IKE SA. Rekeying can use multicast or unicast messages.
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_conn_getvpn/configuration/xe-3s/sec-get-vpn-xe-3s-book/sec-get-vpn.html
Q392. Which two values must be identical to allow IS-IS devices to become neighbors? (Choose two.)
A. interface MTU
B. authentication key
C. IP MTU
D. CLNS address
E. NSEL
F. area ID
Answer: A,B
Q393. Which two statements about 802.1Q tunneling are true? (Choose two.)
A. It requires a system MTU of at least 1504 bytes.
B. The default configuration sends Cisco Discovery Protocol, STP, and VTP information.
C. Traffic that traverses the tunnel is encrypted.
D. It is supported on private VLAN ports.
E. MAC-based QoS and UDLD are supported on tunnel ports.
F. Its maximum allowable system MTU is 1546 bytes.
Answer: A,E
Q394. Which type of OSPF packet is an OSPF link state update packet?
A. type 1
B. type 2
C. type 3
D. type 4
E. type 5
Answer: D
Explanation:
Link State Update packets are OSPF packet type 4. These packets implement the flooding of link state advertisements. Each Link State Update packet carries a collection of link state advertisements one hop further from its origin. Several link state advertisements may be included in a single packet.
Reference: http://www.freesoft.org/CIE/RFC/1583/107.htm
Q395. Refer to the exhibit.
Which statement is true?
A. The command ip multicast rpf multitopology is missing from the configuration.
B. Multitopology routing for multicast has been enabled for IS-IS.
C. This output is invalid.
D. The command mpls traffic-eng multicast-intact is configured on this router.
Answer: B
Explanation:
The following is sample output from the show ip rpf command in a Multi-Topology Routing (MTR) routing environment. In Cisco IOS releases that support MTR, the “RPF topology” field was introduced to indicate which RIB topology is being used for the RPF lookup. For the “RPF topology” field in this example, the first topology listed (ipv4 multicast base) indicates where the nexthop of the RPF lookup is being conducted and the second topology listed (ipv4 unicast data) indicates where the route originated from.
Router# show ip rpf 10.30.30.32
RPF information for ? (10.30.30.32)
RPF interfacE. Ethernet1/0
RPF neighbor: ? (10.1.1.32)
RPF route/mask: 10.30.30.32/32
RPF typE. unicast (ospf 100)
Doing distance-preferred lookups across tables
RPF topology: ipv4 multicast base, originated from ipv4 unicast data
The table below describes the fields shown in the displays.
Table 15 show ip rpf Field Descriptions
Field
Description
RPF information for
Hostname and source address for which RPF information is displayed.
RPF interface
For the given source, the interface from which the router expects to receive packets.
RPF neighbor
For the given source, the neighbor from which the router expects to receive packets.
RPF route/mask
Route number and mask that matched against this source.
RPF type
Routing table from which this route was obtained, either unicast, MBGP, DVMRP, or static mroutes.
RPF recursion count
The number of times the route is recursively resolved.
Doing distance-preferred
Whether RPF was determined based on distance or length of mask.
Using Group Based VRF Select, RPF VRF.
The RPF lookup was based on the group address and the VRF where the RPF lookup is being performed.
Metric preference
The preference value used for selecting the unicast routing metric to the RP announced by the designated forwarder (DF).
Metric
Unicast routing metric to the RP announced by the DF.
RPF topology
RIB topology being used for the RPF lookup, and, if originated from a different RIB topology, which RIB topology the route originated from.
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti/command/imc-xe-3se-5700-cr-book/imc-xe-3se-3850-cr-book_chapter_010.html
Improve ccie 400 101:
Q396. Refer to the exhibit.
Which two statements about the implementation are true? (Choose two.)
A. The PPP multilink protocol header is omitted on delay-sensitive packets.
B. The maximum number of fragments is 1.
C. Small real-time packets are multilink-encapsulated.
D. A transmit queue is provided for smaller packets.
Answer: A,D
Explanation:
Previous implementations of Cisco IOS Multilink PPP (MLP) include support for Link Fragmentation Interleaving (LFI). This feature allows the delivery of delay-sensitive packets, such as the packets of a Voice call, to be expedited by omitting the PPP Multilink Protocol header and sending the packets as raw PPP packets in between the fragments of larger data packets. This feature works well on bundles consisting of a single link. However, when the bundle contains multiple links there is no way to keep the interleaved packets in sequence with respect to each other. The Multiclass Multilink PPP (MCMP) feature in Cisco IOS Release 12.2(13)T addresses the limitations of MLP LFI on bundles containing multiple links by introducing multiple data classes. With multiclass multilink PPP interleaving, large packets can be multilink-encapsulated and fragmented into smaller packets to satisfy the delay requirements of real-time voice traffic; small real-time packets, which are not multilink encapsulated, are transmitted between fragments of the large packets. The interleaving feature also provides a special transmit queue for the smaller, delay-sensitive packets, enabling them to be transmitted earlier than other flows. Interleaving provides the delay bounds for delay-sensitive voice packets on a slow link that is used for other best-effort traffic.
References: http://www.cisco.com/c/en/us/td/docs/ios/dial/configuration/guide/12_4t/dia_12_4t_book/dia _multiclass_link_ppp.pdf http://www.cisco.com/c/en/us/td/docs/routers/access/500/520/software/configuration/guide/520_SCG_Book/520scg_concepts.html
Q397. Which two pieces of information does RTCP use to inform endpoint devices about the RTP flow? (Choose two.)
A. the transmitted octet
B. the lost packet count
C. session control function provisioning information
D. the CNAME for session participants
E. the authentication method
F. MTU size changes in the path of the flow
Answer: A,B
Explanation:
RTCP transports statistics for a media connection and information such as transmitted octet and packet counts, packet loss, packet delay variation, and round-trip delay time. An application may use this information to control quality of service parameters, perhaps by limiting flow, or using a different codec.
Reference: http://en.wikipedia.org/wiki/RTP_Control_Protocol
Q398. DRAG DROP
Drag and drop the RIP configuration command on the left to the function it performs on the right.
Answer:
Q399. Refer to the exhibit.
Which BGP feature is being used?
A. fast session deactivation
B. graceful restart
C. PIC
D. graceful shutdown
Answer: A
Q400. Which Cisco IOS XE process administers routing and forwarding?
A. Forwarding manager
B. Interface manager
C. Cisco IOS
D. Host manager
Answer: C
Explanation:
Some of the processes are listed in the table below:
Process
Purpose
Affected FRUs
SubPackage Mapping
Host Manager
Provides an interface between the IOS process and many of the information-gathering functions of the underlying platform kernel and operating system.
RP (one instance per RP)
SIP (one instance per SIP)
ESP (one instance per ESP)
RPControl
SIPBase
ESPBase
Interface Manager
Provides an interface between the IOS process and the per-SPA interface processes on the SIP.
RP (one instance per RP)
SIP (one instance per SIP)
RPControl
SIPBase
IOS
The IOS process implements all forwarding and routing features for the router.
RP (one per software redundancy instance per RP). Maximum of two instances per RP.
RPIOS
Forwarding Manager
Manages the downloading of configuration to each of the ESPs and the communication of forwarding plane information, such as statistics, to the IOS process.
RP (one per software redundancy instance per RP). Maximum of two instances per RP.
ESP (one per ESP)
RPControl
ESPBase
Reference: http://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asrswcfg /Software_Packaging_Architecture.html