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2021 Jul ccie r&s 400-101:
Q81. Which three roles does a key server perform when used with GETVPN? (Choose three.)
A. It authenticates group members.
B. It manages security policies.
C. It creates group keys.
D. It distributes multicast replication policies.
E. It distributes multicast replication keys.
F. It configures and routes the GDOI protocol.
Answer: A,B,C
Explanation:
Key server is responsible for maintaining security policies, authenticating the Group Members and providing the session key for encrypting traffic. KS authenticates the individual GMs at the time of registration. Only after successful registration the GMs can participate in group SA.
Reference: http://www.cisco.com/c/en/us/products/collateral/security/group-encrypted-transport-vpn/deployment_guide_c07_554713.html
Q82. Which two statements about OSPF route types are true? (Choose two.)
A. The cost of an external type 2 route is the sum of the external and internal costs.
B. The cost of an external type 2 route is the same as the external cost.
C. Intra-area routes originate outside of their area.
D. Inter-area routes originate inside their area.
E. The cost of an external type 1 route is the same as the internal cost.
F. For routes to the same destination, external type 1 routes are preferred over external type 2 routes.
Answer: B,F
Explanation:
External routes fall under two categories, external type 1 and external type 2. The difference between the two is in the way the cost (metric) of the route is being calculated. The cost of a type 2 route is always the external cost, irrespective of the interior cost to reach that route. A type 1 cost is the addition of the external cost and the internal cost used to reach that route. A type 1 route is always preferred over a type 2 route for the same destination.
Reference: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/7039-1.html
Q83. Refer to the exhibit.
Which two issues can cause the interface VLAN10 to be down/down? (Choose two.)
A. The VLAN is inactive or has been removed from the VLAN database.
B. STP is in a forwarding state on the port.
C. A Layer 2 access port is configured with VLAN10, but is in a down/down state.
D. The autostate exclude feature was used on interface VLAN10.
Answer: A,C
Q84. Which component of MPLS architecture uses protocols such as the label distribution protocol and tag distribution protocol to exchange labels?
A. control plane
B. data plane
C. forwarding plane
D. routing plane
Answer: A
Q85. Which two options about PIM-DM are true? (Choose two.)
A. PIM-DM initally floods multicast traffic throughout the network.
B. In a PIM-DM network, routers that have no upstream neighbors prune back unwanted traffic.
C. PIM-DM supports only shared trees.
D. PIM-DM uses a pull model to deliver multicast traffic.
E. PIM-DM cannot be used to build a shared distribution tree.
Answer: A,E
Most up-to-date testking 400-101:
Q86. Which two protocols are not protected in an edge router by using control plane policing? (Choose two.)
A. SMTP
B. RPC
C. SSH
D. Telnet
Answer: A,B
Explanation:
A CoPP policy can limit a number of different packet types that are forwarded to the control plane. Traffic destined for the switch CPU includes:
. Address Resolution Protocol (ARP)
. First-hop redundancy protocol packets
. Layer 2 control packets
. Management packets (telnet, Secure Shell [SSH] Protocol, Simple Network Management Protocol [SNMP]) <--- C and D are not correct.
. Multicast control packets
. Routing protocol packets
. Packets with IP options
. Packets with time to live (TTL) set to 1
. Packets that require ACL logging
. Packets that require an initial lookup (first packet in a flow: FIB miss)
. Packets that have don't support hardware switching/routing
Reference: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6500-series-switches/white_paper_c11_553261.html
Q87. Which three protocols support SSM? (Choose three.)
A. IGMPv2
B. IGMPv3
C. IGMP v3lite
D. URD
E. CGMP
F. IGMPv1
Answer: B,C,D
Q88. Refer to the exhibit.
If a console port is configured as shown, which response is displayed when you connect to the console port?
A. a blinking cursor
B. the message "Authorized users only"
C. the username prompt
D. three username name prompts followed by a timeout message
E. the message "Connection refused"
Answer: A
Q89. Refer to the exhibit.
Which statement about this GETVPN configuration is true?
A. Co-operative key servers are configured.
B. Redundant peers are configured.
C. The key server uses multicast mode to propagate rekey messages.
D. PSK authentication is configured.
Answer: A
Q90. Which option is the default number of routes over which EIGRP can load balance?
A. 1
B. 4
C. 8
D. 16
Answer: B
Explanation:
By default, EIGRP load-shares over four equal-cost paths. For load sharing to happen, the routes to load-share over must show up in the IP forwarding table or with the show ip route command. Only when a route shows up in the forwarding table with multiple paths to it will load sharing occur.
Reference: http://www.informit.com/library/content.aspx?b=CCIE_Practical_Studies_I&seqNum=126