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Q301. Which statement about OTV is true?
A. The overlay interface becomes active only when configuration is complete and it is manually enabled.
B. OTV data groups can operate only in PIM sparse-mode.
C. The overlay interface becomes active immediately when it is configured.
D. The interface facing the OTV groups must be configured with the highest MTU possible.
Answer: A
Explanation:
OTV has the following configuration guidelines and limitations:
. If the same device serves as the default gateway in a VLAN interface and the OTV edge device for the VLANs being extended, configure OTV on a device (VDC or switch) that is separate from the VLAN interfaces (SVIs).
. When possible, we recommend that you use a separate nondefault VDC for OTV to allow for better manageability and maintenance.
. An overlay interface will only be in an up state if the overlay interface configuration is complete and enabled (no shutdown). The join interface has to be in an up state.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/nx-os/OTV/config_guide/b_Cisco_Nexus_7000_Series_NX-OS_OTV_Configuration_Guide/basic-otv.html
Q302. Which statement is true about Fast Link Pulses in Ethernet?
A. They are used during collision detection.
B. They are used only if the media type is optical.
C. They are part of UniDirectional Link Detection.
D. They are used during autonegotiation.
Answer: D
Explanation:
To make sure that your connection is operating properly, IEEE 802.3 Ethernet employs normal link pulses (NLPs), which are used for verifying link integrity in a 10BaseT system. This signaling gives you the link indication when you attach to the hub and is performed between two directly connected link interfaces (hub-to-station or station-to-station). NLPs are helpful in determining that a link has been established between devices, but they are not a good indicator that your cabling is free of problems. An extension of NLPs is fast link pulses. These do not perform link tests, but instead are employed in the autonegotiation process to advertise a device's capabilities.
Reference:
http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/tr1904.html
Q303. What is the maximum number of secondary IP addresses that can be configured on a router interface?
A. 1
B. 2
C. 4
D. 1024
E. 65535
F. no limit to the number of addresses
Answer: F
Explanation:
From “IP Routing Frequently Asked Questions”
Q. What are the maximum number of secondary IP addesses that can be configured on a router interface?
.A. There are no limits on configuring secondary IP addresses on a router interface.
Reference: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/28745-44.html#q21
Q304. Refer to the exhibit.
What will be the IP MTU of tunnel 0?
A. 1500
B. 1524
C. 1476
D. 1452
E. 1548
Answer: C
Explanation:
In the case of the GRE tunnel interface, the IP maximum transmission unit (MTU) is 24 bytes less than the IP MTU of the real outgoing interface. For an Ethernet outgoing interface that means the IP MTU on the tunnel interface would be 1500 minus 24, or 1476 bytes.
Reference: A spoke site that is connected to Router-A cannot reach a spoke site that is connected to Router-B, but both spoke sites can reach the hub. What is the likely cause of this issue http://www.cisco.com/c/en/us/support/docs/ip/generic-routing-encapsulation-gre/13725-56.html
Q305. Which statement about the RPF interface in a BIDIR-PIM network is true?
A. In a BIDIR-PIM network, the RPF interface is always the interface that is used to reach the PIM rendezvous point.
B. In a BIDIR-PIM network, the RPF interface can be the interface that is used to reach the PIM rendezvous point or the interface that is used to reach the source.
C. In a BIDIR-PIM network, the RPF interface is always the interface that is used to reach the source.
D. There is no RPF interface concept in BIDIR-PIM networks.
Answer: A
Explanation:
RPF stands for "Reverse Path Forwarding". The RPF Interface of a router with respect to an address is the interface that the MRIB indicates should be used to reach that address. In the case of a BIDIR-PIM multicast group, the RPF interface is determined by looking up the Rendezvous Point Address in the MRIB. The RPF information determines the interface of the router that would be used to send packets towards the Rendezvous Point Link for the group.
Reference: https://tools.ietf.org/html/rfc5015
Q306. Refer to the exhibit.
Which prefixes will appear in the EIGRP topology table?
A. 10.0.0.0/8, 172.16.1.0/24, 192.168.0.0/16
B. 10.1.1.0/24, 10.1.2.0/24, 172.16.1.0/26, 192.168.1.0/26, 192.168.2.0/26
C. 10.1.1.0/24, 10.1.2.0/24, 172.16.1.0/26, 172.16.2.0/26, 192.168.1.0/26, 192.168.2.0/26
D. 10.1.1.1/24, 10.1.2.1/24, 172.16.1.1/26, 172, 192.168.1.1/26, 192.168.2.1/26
Answer: B
Q307. Refer to the exhibit.
Which three statements about the device with this configuration are true? (Choose three.)
A. Multiple AFIs are configured on the device.
B. The authentication on 172.16.129.7 is configured incorrectly.
C. The device is configured to support MPLS VPNs.
D. This device is configured with a single AFI.
E. The authentication on 172.16.129.4 is configured incorrectly.
F. The device is configured to support L2VPNs.
Answer: A,B,C
Q308. Which two statements about PIM-DM are true? (Choose two.)
A. It forwards multicast packets on a source tree.
B. It requires an RP.
C. It forwards multicast packets on a shared distribution tree.
D. It floods multicast packets to neighbors that have requested the data.
E. It floods multicast packets throughout the network.
F. It forwards multicast packets to neighbors that have requested the data.
Answer: A,E
Q309. Which protocol will accept incoming updates when the passive-interface command is configured?
A. OSPF
B. IS-IS
C. RIP
D. EIGRP
Answer: C
Q310. Refer to the exhibit.
Router 1 and Router 2 use HSRP to provide first hop redundancy for hosts on the 10.1.2.0/24 network.
Which feature can provide additional failover coverage for the PC?
A. Cisco Express Forwarding
B. NetFlow
C. Accounting
D. Enhanced Object Tracking
Answer: D
Explanation:
HSRP has a mechanism for tracking the interface line-protocol state. The enhanced object tracking feature separates the tracking mechanism from HSRP. It creates a separate, standalone tracking process that can be used by processes other than HSRP. This feature allows tracking of other objects in addition to the interface line-protocol state. A client process, such as HSRP, can register an interest in tracking objects and request notification when the tracked object changes state. Several clients can track the same object, and can take different actions when the object changes state. This feature increases the availability and speed of recovery of a router system and decreases outages and outage duration.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/blades/3040/software/release/12-2_44_se/configuration/guide/swhsrp.html#wp1083927