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QUESTION 35
On what will the class-map VOICE match?
A. only UDP traffic between port ranges 16384 and 32787
B. only DSCP EF traffic
C. both UDP traffic between port ranges 16384 and 32787 and DSCP EF traffic
D. only EF traffic that is UDP and is within the UDP range 16384-32787
Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 36
Which two statements are true about bandwidth guarantee? (Choose two.)
A. When congestion is present, the priority command doesn’t allow exceeding the allocated rate
B. When congestion isn’t present, the priority command doesn’t allow exceeding the allocated rate
C. When congestion is present, the priority command allows exceeding the allocated rate
D. When congestion isn’t present, the priority command allows exceeding the allocated rate
Correct Answer: AD Section: (none)Explanation
Explanation/Reference:
QUESTION 37
Which three protocols should be explicitly managed by using Control Plane Policing on an Internet border router? (Choose three.)
A. LDAP
B. ICMP
C. BGP
D. SSH
Correct Answer: BCD Section: (none)Explanation
Explanation/Reference:
C. RTP
F. RDP Explanation:
Control Plane Security and Packet QoS Overview To protect the CP on a router from DoS attacks and to provide packet QoS, the Control Plane Policing feature treats the CP as a separate entity with its own ingress (input) and egress (output) ports, which are like ports on a router and switch. Because the Control Plane Policing feature treats the CP as a separate entity, a set of rules can be established and associated with the ingress and egress port of the CP. These rules are applied only after the packet has been determined to have the CP as its destination or when a packet exits from the CP. Thereafter, you can configure a service policy to prevent unwanted packets from progressing after a specified rate limit has been reached; for example, a system administrator can limit all TCP/SYN packets that are destined for the CP to a maximum rate of 1 megabit per second. Input CP services are executed after router input port services and a routing decision on the input path have been made. As shown in Figure 2, CP security and packet QoS are applied on: An aggregate level by the central switch engine and applied to all CP packets received from all line cards on the router (see Aggregate Control Plane Services) A distributed level by the distributed switch engine of a line card and applied to all CP packets received from all interfaces on the line card (see Distributed Control Plane Services) Figure 2 Input Control Plane Services: Aggregate and Distributed Services
The following types of Layer 3 packets are forwarded to the control plane and processed by aggregate and distributed control plane policing: Routing protocol control packets Packets destined for the local IP address of the router Packets from management protocols (such as Simple Network Management Protocol [SNMP], Telnet, and secure shell [SSH]) Note Ensure that Layer 3 control packets have priority over other packet types that are destined for the control plane. Reference http://www.cisco.com/en/US/docs/ios/12_3t/12_3t4/feature/guide/gtrtlimt.html
QUESTION 38
What is a characteristic of Network Time Protocol?