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Q1. DRAG DROP
Drag and drop the PPPoE packet type on the left to the corresponding description on the right.
Answer:
Q2. Refer to the exhibit.
Assuming that the peer is configured correctly and the interface is up, how many neighbors will be seen in the EIGRPv6 neighbor table on this IPv6-only router?
A. one neighbor, which will use a local router-id of 6010. AB8. . /64
B. one neighbor, which will use a local router-id of 6020. AB8. . /64
C. none, because EIGRPv6 only supports authenticated peers
D. none, because of the mismatch of timers
E. none, because there is no EIGRP router ID configured
Answer: E
Explanation:
Configuring EIGRP for IPv6 has some restrictions; they are listed below:
. The interfaces can be directly configured with EIGRP for IPv6, without the use of a global IPv6 address. There is no network statement in EIGRP for IPv6.
. The router ID needs to be configured for an EIGRPv6 protocol instance before it can run.
. EIGRP for IPv6 has a shutdown feature. Ensure that the routing process is in "no shut" mode to start running the protocol.
Reference: http://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/113267-eigrp-ipv6-00.html
Q3. Which statement about traffic management when PIM snooping is enabled is true?
A. Traffic is restricted to host ports.
B. All multicast traffic is flooded to the designated router.
C. Join message are flooded to all routers.
D. Designated routers receive traffic only from groups through which a join message is received.
Answer: D
Q4. For which feature is the address family "rtfilter" used?
A. Enhanced Route Refresh
B. MPLS VPN filtering
C. Route Target Constraint
D. Unified MPLS
Answer: C
Explanation:
With Multiprotocol Label Switching (MPLS) VPN, the internal Border Gateway Protocol (iBGP) peer or Route Reflector (RR) sends all VPN4 and/or VPN6 prefixes to the PE routers. The PE router drops the VPN4/6 prefixes for which there is no importing VPN routing and forwarding (VRF). This is a behavior where the RR sends VPN4/6 prefixes to the PE router, which it does not need. This is a waste of processing power on the RR and the PE and a waste of bandwidth. With Route Target Constraint (RTC), the RR sends only wanted VPN4/6 prefixes to the PE. 'Wanted' means that the PE has VRF importing the specific prefixes. RFC 4684 specifies Route Target Constraint (RTC). The support is through a new address family rtfilter for both VPNv4 and VPNv6.
Reference: http://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/116062-technologies-technote-restraint-00.html
Q5. Which two message types allow PIM snooping to forward multicast traffic? (Choose two.)
A. hello messages
B. leave messages
C. membership query messages
D. bidirectional PIM DF election messages
Answer: A,D
Q6. Which two statements about SNMP traps are true? (Choose two.)
A. They are sent by an agent after a specified event.
B. They are sent when solicited after a specified event.
C. They are equivalent to a community string.
D. They provide solicited data to the manager.
E. They are sent by a management station to an agent.
F. Vendor-specific traps can be configured.
Answer: A,F
Explanation:
The SNMP agent contains MIB variables whose values the SNMP manager can request or change. A manager can get a value from an agent or store a value into the agent. The agent gathers data from the MIB, the repository for information about device parameters and network data. The agent can also respond to a manager's requests to get or set data. An agent can send unsolicited traps to the manager. Traps are messages alerting the SNMP manager to a condition on the network. Traps can mean improper user authentication, restarts, link status (up or down), MAC address tracking, closing of a TCP connection, loss of connection to a neighbor, or other significant events.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_55_se/configuration/guide/scg_2960/swsnmp.html
Q7. What is the most common use for route tagging in EIGRP?
A. to determine the route source for management purposes
B. to change the metric of a prefix
C. to filter routes in order to prevent routing loops
D. to modify path selection for certain classes of traffic
Answer: C
Q8. Refer to the exhibit.
Why is the router out of memory?
A. The router is experiencing a BGP memory leak software defect.
B. The BGP peers have been up for too long.
C. The amount of BGP update traffic in the network is too high.
D. The router has insufficient memory due to the size of the BGP database.
Answer: D
Explanation:
Here we can see that this router is running out of memory due to the large size of the BGP routing database. In this case, this router is receiving over 200,000 routes from each of the 4 peers.
Q9. Which two packet types does an RTP session consist of? (Choose two.)
A. TCP
B. RTCP
C. RTP
D. ICMP
E. BOOTP
F. ARP
Answer: B,C
Explanation:
An RTP session is established for each multimedia stream. A session consists of an IP address with a pair of ports for RTP and RTCP. For example, audio and video streams use separate RTP sessions, enabling a receiver to deselect a particular stream. The ports which form a session are negotiated using other protocols such as RTSP (using SDP in the setup method) and SIP. According to the specification, an RTP port should be even and the RTCP port is the next higher odd port number.
Reference: http://en.wikipedia.org/wiki/Real-time_Transport_Protocol
Q10. Which three events can cause a control plane to become overwhelmed? (Choose three.)
A. a worm attack
B. processing a stream of jumbo packets
C. a microburst
D. a configuration error
E. a reconvergence failure
F. a device-generated FTP session
Answer: A,D,E