[2021-New] Cisco 400-101 Dumps With Update Exam Questions (191-200)

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400-101 Exam Questions - Online Test

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Q1. Refer to the exhibit.

Which configuration reduces CPU utilization on R2 while still advertising the connected routes of R2 to R1?

A. Configure eigrp stub connected on R2.

B. Configure eigrp stub receive-only on R1.

C. Configure eigrp stub static on R2.

D. Configure eigrp stub summary on R1.

Answer: A

Q2. Which three features require Cisco Express Forwarding? (Choose three.)

A. NBAR

B. AutoQoS

C. fragmentation

D. MPLS

E. UplinkFast

F. BackboneFast

Answer: A,B,D

Explanation:

QoS Features That Require CEF

These class-based QoS features are supported only on routers that run CEF.

.Network Based Application Recognition (NBAR) provides intelligent network classification. For more information, refer to Network Based Application Recognition.

. The AutoQoS -VoIP feature simplifies and speeds up the implementation and provisioning of QoS for VoIP traffic. This feature is enabled with the help of the auto qos voip command. CEF must be enabled at the interface or ATM PVC before the auto qos command can be used. For more information about this feature and its prerequisites, refer to AutoQoS -VoIP.

From MPLS Fundamentals - Luc De Ghein

Why Is CEF Needed in MPLS Networks?

Concerning MPLS, CEF is special for a certain reason; otherwise, this book would not explicitly cover it. Labeled packets that enter the router are switched according to the label forwarding information base (LFIB) on the router. IP packets that enter the router are switched according to the CEF table on the router. Regardless of whether the packet is switched according to the LFIB or the CEF table, the outgoing packet can be a labeled packet or an IP packet

Reference: http://www.cisco.com/c/en/us/support/docs/asynchronous-transfer-mode-atm/ip-to-atm-class-of-service/4800-cefreq.html

Q3. Which protocol uses a proprietary 2-byte Type field for multiple protocol support?

A. HDLC

B. PPP

C. CHAP

D. PAP

Answer: A

Q4. Which address is a MAC address that is mapped from an IPv6 address (RFC 2464)?

A. 3333.FF17.FC0F

B. FFFE. FF17.FC0F

C. FF34.3333.FF17

D. FF7E.FF17.FC0F

Answer: A

Explanation:

An IPv6 packet with a multicast destination address DST, consisting of the sixteen octets DST through DST, is transmitted to the Ethernet multicast address whose first two octets are the value 3333 hexadecimal and whose last four octets are the last four octets of DST.

Reference: https://tools.ietf.org/html/rfc2464

Q5. Which VPN technology requires the use of an external key server?

A. GETVPN

B. GDOI

C. SSL

D. DMVPN

E. IPsec F. L2TPv3

Answer: A

Explanation:

A GETVPN deployment has primarily three components, Key Server (KS), Group Member (GM), and Group Domain of Interpretation (GDOI) protocol. GMs do encrypt/decrypt the traffic and KS distribute the encryption key to all the group members. The KS decides on one single data encryption key for a given life time. Since all GMs use the same key, any GM can decrypt the traffic encrypted by any other GM. GDOI protocol is used between the GM and KS for group key and group SA management. Minimum one KS is required for a GETVPN deployment.

Reference: http://www.cisco.com/c/en/us/products/collateral/security/group-encrypted-transport-vpn/deployment_guide_c07_554713.html

Q6. Refer to the exhibit.

Which statement is true?

A. R2 is directly connected to the receiver for this group and is the winner of an assert mechanism.

B. R2 is directly connected to the receiver for this group, and it forwards the traffic onto Ethernet3/0, but it is forwarding duplicate traffic onto Ethernet3/0.

C. R2 has the A flag (Accept flag) set on Ethernet 3/0. This is fine, since the group is in BIDIR-PIM mode.

D. R2 is directly connected to the receiver for this group and is the loser of an assert mechanism.

E. The A flag is set until the SPT threshold is reached for this multicast group.

Answer: A

Explanation:

show ip mroute Field Descriptions

Field

Description

RPF neighbor or RPF nbr

IP address of the upstream router to the source. Tunneling indicates that this router is sending data to the RP encapsulated in register packets. The hexadecimal number in parentheses indicates to which RP it is registering. Each bit indicates a different RP if multiple RPs per group are used. If an asterisk (*) appears after the IP address in this field, the RPF neighbor has been learned through an assert.

Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_2/ipmulti/command/reference/fiprmc_r/1rfmult 3.html

Q7. DRAG DROP

Drag each SNMP term on the left to the matching definition on the right.

Answer:

Q8. DRAG DROP

Drag and drop each MLPPP command on the left to the function it performs on the right.

Answer:

Q9. DRAG DROP

Drag and drop the OSPF network type on the left to the correct category of timers on the right.

Answer:

Q10. Refer to the exhibit.

Which two statements about this egress queue are true? (Choose two.)

A. The queue 3 buffer is allocated 20 percent, its drop threshold is 100 percent, and it is guaranteed 400 percent of memory.

B. The queue 1 buffer is allocated 30 percent, its drop threshold is 25 percent, and it is guaranteed 100 percent of memory.

C. The queue 1 buffer is allocated 30 percent, its drop threshold is 100 percent, and it is guaranteed 150 percent of memory.

D. The queue 2 buffer is allocated 30 percent, its drop threshold is 200 percent, and it can use at maximum 400 percent of memory.

E. The queue 3 buffer is allocated 30 percent, its drop threshold is 100 percent, and it can use at maximum 400 percent of memory.

Answer: B,D