CompTIA CN0-201 Online Practice Questions and Exam Preparation

CompTIA CN0-201 Online Questions & Answers

• Question 291:

  Which of the following layers of the OSI model is responsible for establishing communication session between the processes running on different communication entities in a network?

  A. Layer 7 (Application layer)
  B. Layer 2 (Data-link layer)
  C. Layer 5 (Session layer)
  D. Layer 3 (Network layer)
  C. Layer 5 (Session layer)

• Question 292:

  Which of the following provides users the ability to consistently access multiple message types through a single user interface?

  A. Unified messaging
  B. SIP presence
  C. Chatting
  D. Instant messaging
  A. Unified messaging

• Question 293:

  Which of the following protocols provides sequence numbers to VoIP packets?

  A. TCP
  B. RTP
  C. UDP
  D. SCCP
  B. RTP

• Question 294:

  What is the bit rate of digitized voice using Pulse Code Modulation (PCM)?

  A. 32000 bps
  B. 64000 bps
  C. 16000 bps
  D. 8000 bps
  B. 64000 bps

• Question 295:

  The H .323 protocol uses ASN.1 binary code and the Session Initiation Protocol (SIP) uses ASCII text standard to format its messages. Which of the following layers of the OSI model is responsible for translating, processing, and reading ASN.1 and ASCII messages?

  A. Transport layer
  B. Presentation layer
  C. Application layer
  D. Network layer
  B. Presentation layer

• Question 296:

  Mark is a technician for McNeil Inc. He is implementing a video conferencing over IP solution. He wants to ensure that he has sufficient bandwidth. He wants to upgrade the infrastructure, because he still has 5 Mbps links in many areas. What factors should he consider when upgrading the infrastructure to support video over IP? Each correct answer represents a complete solution. Choose all that apply.

  A. Bandwidth requirement of applications
  B. Management overhead
  C. 5 Mbps reduction
  D. Number of concurrent users
  A. Bandwidth requirement of applications
  B. Management overhead
  D. Number of concurrent users

• Question 297:

  Which of the following priority values of 802.1p defines network control?

  A. 6
  B. 4
  C. 5
  D. 7
  D. 7

• Question 298:

  Which of the following are examples of interactive communication? Each correct answer represents a complete solution. Choose all that apply.

  A. Fax
  B. Phone call
  C. Video Conferencing
  D. E-mail
  B. Phone call
  C. Video Conferencing

• Question 299:

  Which of the following are the advantages of the Diffserv model? Each correct answer represents a complete solution. Choose two.

  A. Highly efficient tools
  B. Large number of service classes
  C. High scalability
  D. Admission control for each request
  B. Large number of service classes
  C. High scalability

• Question 300:

  Which of the following DoS attacks attempts to block service or reduce activity on a host by sending ping requests directly to the victim?

  A. Teardrop attack
  B. Ping flood attack
  C. Land attack
  D. SYN flood attack
  B. Ping flood attack