Download Cisco Certified Network Associate (200-301 CCNA).200-301.ChineseDumps.2021-08-11.431q.vcex

Vendor: Cisco
Exam Code: 200-301
Exam Name: Cisco Certified Network Associate (200-301 CCNA)
Date: Aug 11, 2021
File Size: 21 MB
Downloads: 3
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Question 1
Drag and drop the characteristics of network architectures from the left onto the type of architecture on the right. 
 
 
Correct answer: To work with this question, an Exam Simulator is required.
Explanation:
   
 
  
Question 2
What is an advantage of Cisco DNA Center versus traditional campus device management?
  1. It supports numerous extensibility options including cross-domain adapters and third-party SDKs.
  2. It supports high availability for management functions when operating in cluster mode.
  3. It enables easy autodiscovery of network elements m a brownfield deployment. 
  4. It is designed primarily to provide network assurance.
Correct answer: A
Question 3
In software-defined architecture, which place handles switching for traffic through a Cisco router?
  1. Control
  2. Management
  3. Data
  4. application
Correct answer: C
Question 4
When configuring a WLAN with WPA2 PSK in the Cisco Wireless LAN Controller GUI, which two formats are available to select? (Choose two)
  1. ASCII  
  2. base64
  3. binary
  4. decimal
  5. hexadecimal
Correct answer: AE
Question 5
How do TCP and UDP differ in the way they guarantee packet delivery?
  1. TCP uses checksum, acknowledgement, and retransmissions, and UDP uses checksums only.
  2. TCP uses two-dimensional parity checks, checksums, and cyclic redundancy checks and UDP uses retransmissions only.
  3. TCP uses checksum, parity checks, and retransmissions, and UDP uses acknowledgements only.
  4. TCP uses retransmissions, acknowledgement and parity checks and UDP uses cyclic redundancy checks only.
Correct answer: A
Question 6
Which two actions are performed by the Weighted Random Early Detection mechanism? (Choose two)
  1. It drops lower-priority packets before it drops higher-priority packets
  2. It can identify different flows with a high level of granularity
  3. It guarantees the delivery of high-priority packets
  4. It can mitigate congestion by preventing the queue from filling up
  5. it supports protocol discovery
Correct answer: AD
Explanation:
Weighted Random Early Detection (WRED) is just a congestion avoidance mechanism. WRED drops packets selectively based on IP precedence. Edge routers assign IP precedences to packets as they enter the network. When a packet arrives, the following events occur:The average queue size is calculated.If the average is less than the minimum queue threshold, the arriving packet is queued.If the average is between the minimum queue threshold for that type of traffic and the maximum threshold for the interface, the packet is either dropped or queued, depending on the packet drop probability for that type of traffic.If the average queue size is greater than the maximum threshold, the packet is dropped. WRED reduces the chances of tail drop (when the queue is full, the packet is dropped) by selectively dropping packets when the output interface begins to show signs of congestion (thus it can mitigate congestion by preventing the queue from filling up). By dropping some packets early rather than waiting until the queue is full, WRED avoids dropping large numbers of packets at once and minimizes the chances of global synchronization. Thus, WRED allows the transmission line to be usedfully at all times. WRED generally drops packets selectively based on IP precedence. Packets with a higher IP precedence are less likely to be dropped than packets with a lower precedence. Thus, the higher the priority of a packet, the higher the probability that the packet will be delivered
Weighted Random Early Detection (WRED) is just a congestion avoidance mechanism. WRED drops packets selectively based on IP precedence. 
Edge routers assign IP precedences to packets as they enter the network. 
When a packet arrives, the following events occur:
  1. The average queue size is calculated.
  2. If the average is less than the minimum queue threshold, the arriving packet is queued.
  3. If the average is between the minimum queue threshold for that type of traffic and the maximum threshold for the interface, the packet is either dropped or queued, depending on the packet drop probability for that type of traffic.
  4. If the average queue size is greater than the maximum threshold, the packet is dropped. WRED reduces the chances of tail drop (when the queue is full, the packet is dropped) by selectively dropping packets when the output interface begins to show signs of congestion (thus it can mitigate congestion by preventing the queue from filling up). By dropping some packets early rather than waiting until the queue is full, WRED avoids dropping large numbers of packets at once and minimizes the chances of global synchronization. Thus, WRED allows the transmission line to be usedfully at all times. 
WRED generally drops packets selectively based on IP precedence. Packets with a higher IP precedence are less likely to be dropped than packets with a lower precedence. Thus, the higher the priority of a packet, the higher the probability that the packet will be delivered
Question 7
Which technology allows for multiple operating systems to be run on a single host computer?
  1. virtual routing and forwarding
  2. network port ID visualization
  3. virtual device contexts
  4. server visualization
Correct answer: D
Question 8
A frame that enters a switch fails the Frame Check Sequence. Which two interface counters are incremented? (Choose two)
  1. runts
  2. giants
  3. frame
  4. CRC
  5. input errors
Correct answer: DE
Explanation:
Whenever the physical transmission has problems, the receiving device might receive a frame whose bits have changed values. These frames do not pass the error detection logic as implemented in the FCS field in the Ethernet trailer. The receiving device discards the frame and counts it as some kind of input error. Cisco switches list this error as a CRC error. Cyclic redundancy check (CRC) is a term related to how the FCS math detects an error. The “input errors” includes runts, giants, no buffer, CRC, frame, overrun, and ignored counts. The output below show the interface counters with the “show interface s0/0/0” command:      
Whenever the physical transmission has problems, the receiving device might receive a frame whose bits have changed values. These frames do not pass the error detection logic as implemented in the FCS field in the Ethernet trailer. The receiving device discards the frame and counts it as some kind of input error. 
Cisco switches list this error as a CRC error. Cyclic redundancy check (CRC) is a term related to how the FCS math detects an error. 
The “input errors” includes runts, giants, no buffer, CRC, frame, overrun, and ignored counts. 
The output below show the interface counters with the “show interface s0/0/0” command:
     
Question 9
Which implementation provides the strongest encryption combination for the wireless environment?
  1. WPA2 + AES  
  2. WPA + AES
  3. WEP
  4. WPA + TKIP
Correct answer: A
Question 10
Refer to the exhibit. 
     
Which switch in this configuration will be elected as the root bridge? 
     
  1. SW1
  2. SW2
  3. SW3
  4. SW4
Correct answer: C
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