CCNP ONT Certification Test! Trivia Quiz
This is a quiz over basic ONT topics. It is not intended to be a full review of material for the ONT exam, but a quick test of basic knowledge.
- 1.When is VAD most effective in reducing the amount of bandwidth consumed by VoIP calls?
- A.
When it can be used for RTP header compression.
- B.
When calls are mostly silence.
- C.
On links less than 128Kbps.
- D.
When it can be done using hardware vs. software based compression.
- E.
When it is used with frame relay links.
- 2.What is the most complicated method for implementing QoS?
- A.
MQC
- B.
AutoQoS
- C.
SDM
- D.
CLI
- E.
ACL
- 3.What are the similarities and differences between traffic shaping and policing?
- A.
Traffic shaping and policing both help with congestion. Traffic shaping buffers excess traffic, traffic policing drops excess traffic.
- B.
Traffic shaping and policing both help with congestion. Traffic shaping drops excess traffic, traffic policing queues excess traffic.
- C.
Traffic shaping and policing both help with congestion. Traffic policing drops or marks excess traffic, traffic shaping queues excess traffic.
- D.
Traffic shaping and policing always depend on classes. Traffic shaping queues excess traffic, traffic policing buffers excess traffic.
- 4.Wireless Access Points that use Wireless LAN controllers are called what?
- A.
Lightweight Access Points
- B.
Stand-alone Access Points
- C.
Client Access Points
- D.
Autonomous Access Points
- E.
802.11e Access Points
- 5.What are the shortcomings of AutoQoS? (Select All that apply.)
- A.
Too many traffic classes are generated by default.
- B.
The AutoQoS configuration does not automatically change when the network does.
- C.
The configuration generated by AutoQoS does not fit all network situations.
- D.
AutoQoS cannot be used on encrypted tunnel interfaces.
- E.
AutoQoS cannot be used with HTTP MIME types.
- 6.The Cisco Wireless LAN Solution Engine (WLSE) requires what to function? (Select All That Apply.)
- A.
Lightweight Access Points
- B.
Autonomous Access Points
- C.
Wireless LAN Controllers
- D.
Catalyst 6500 Series Wireless LAN Solutions Module
- E.
CiscoWorks Wireless LAN Solutions Engine
- 7.The Cisco Unified Wireless Solution requires which of the following to function? (Choose all that apply.)
- A.
Mobility Services
- B.
Client Devices
- C.
Network Management
- D.
Network Unification
- E.
Autonomous Access Points
- 8.What does CAC do to assist with VoIP calls?
- A.
Provides signalling for end-to-end QoS
- B.
Creates a Priority Queue using LLQ for VoIP packets
- C.
Handles call initiation and tear-down
- D.
Ensures enough bandwidth is available for a call before allowing it to be made
- E.
Ensures that a call is allowed by security policy before allowing it to be made
- 9.What is the command to enable RSVP on an interface?
- A.
Bandwidth rsvp
- B.
Rsvp bandwidth
- C.
Ip rsvp bandwidth
- D.
Ip qos rsvp
- E.
Autovoip rsvp
- 10.LFI aids with congestion how?
- A.
By fragmenting larger packets into smaller packets and interspersing smaller packets between them.
- B.
By combining smaller packets into larger packets to reduce the overall amount of packets.
- C.
By creating a priority queue above CBWFQ for VoIP traffic.
- D.
By randomly dropping packets to avoid tail drop.
- E.
By policing overly aggressive flows so that smaller flows are able to use an interface.
- 11.Your boss wants to deploy VoIP on the network and has come to you wanting a QoS solution that will give priority to VoIP and help ease congestion. What would be your best recommendation given that he is not ready to deploy end-to-end QoS and he wants a high degree of control?
- A.
CQ with RED. This will allow you to create specific queues for traffic based on business needs and reduce congestion from the most aggresive flows.
- B.
AutoQos. This will allow a quick and easy deployment and would automatically take into account VoIP traffic.
- C.
PQ with WRED. This would allow you to assign VoIP to a highest priority queue and allow you to drop packets from lower priority flows first.
- D.
FIFO with RED. This would ease congestion by forcing slow TCP flows to transmit and would be easy to configure.
- E.
LLQ with WRED. This would allow VoIP traffic a priority queue along with CBWFQ. WRED would drop least important packets first.
- 12.Which of the following orders of commands is correct for configuring LLQ on an interface using MQC? (Note that this is simplified to only 1 class for the sake of brevity and only QoS commands are included.)
- A.
Access-list 100 permit any any udp range 16384 32000 class-map voip match access-group 100 policy-map 11q class voip priority 32 interface serial1/0 bandwidth 256 service-policy output 11q
- B.
Interface serial1/0 bandwidth 256 service-policy output 11q class-map voip match access-group 100 policy-map 11q class voip priority 32 access-list 100 permit any any udp range 16384 3200
- C.
Access-list 100 permit any any udp range 16384 32000 policy-map 11q class voip priority 32 class-map voip match access-group 100 interface serial1/0 bandwidth 256 service-policy output 11q
- D.
Class-map voip match access-group 100 interface serial1/0 bandwidth 256 service-policy output 11q policy-map 11q class voip priority 32
- E.
Interface serial1/0 bandwidth 256 access-list 100 permit any any udp range 16384 32000 class map voip match access-group 100 policy map 11q class voip priority 32
- 13.True or False: cRTP can not be enabled on Frame Relay links.
- A.
True
- B.
False
- 14.What is the generally accepted limit for delay for VoIP (round trip)?
- A.
256Kbps
- B.
250ms
- C.
500ms
- D.
3Mbps
- E.
125ms
- 15.How does DiffServ differ from IntServ? (Choose all that apply.)
- A.
DiffServ does not use signaling and uses per-hop behavior to enable end-to-end QoS.
- B.
IntServ is called "hard QoS" and enforces QoS with resource reservation.
- C.
All of the these answers are true.
- D.
IntServ uses RSVP.
- E.
DiffServ uses DSCP.
- 16.What is the header overhead for uncompressed headers used in calculating bandwidth for a VoIP call?
- A.
IP - 8 bytes UDP - 12 bytes RTP - 20 bytes
- B.
IP - 20 bytes UDP - 12 bytes RTP - 8 bytes
- C.
IP - 20 bytes UDP - 15 bytes RTP - 8 bytes
- D.
IP - 20 bytes UDP - 8 bytes RTP - 12 bytes
- 17.What is not considered when calculating total bandwidth for a VoIP call?
- A.
Layer 2 header overhead
- B.
Serialization Delay
- C.
Voice Payload
- D.
Header Compression
- E.
Transmit Rate
- 18.What is a MIC?
- A.
A Wireless Network Card for Draft-N technologies.
- B.
A Management Interface Controller for a Wireless LAN Controller.
- C.
A GPS transmitter that allows a Wireless Location Appliance to track clients and access points.
- D.
A dynamic key generated for use with TKIP for authentication.
- E.
A trap used with SNMP to report back issues with a Lightweight Wireless Access Point to a SNMP server.
- 19.What levels of QoS does the Cisco Unified Wireless Solution support?
- A.
Interactive Voice, Transactional, Bulk Data, and Signalling
- B.
Platinum/Voice, Gold/Video, Silver/Best Effort, Bronze/Background
- C.
1, 2, 3, 4, 5, 6, 7 - with 7 reserved for signalling and management
- 20.Which Wireless Standard does Cisco use for Wireless QoS?
- A.
802.11a
- B.
802.11b
- C.
802.11g
- D.
802.1p
- E.
802.11e
- 21.All the traffic flowing through a router that belongs to the same class in DiffServ is referred to as a
- A.
Behavior Aggregate
- 22.How does IntServ decide if there is enough bandwidth to forward a packet?
- A.
It uses the CIR configured on the interface and makes sure the packet size is smaller than the CIR.
- B.
It checks for Explicit Congestion Notification messages sent from the next hop.
- C.
It uses a token bucket system and forwards a packet only if enough tokens are present.
- D.
It uses strict priority queuing to ensure that bandwidth is reserved for each flow.
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