N10-008

N10-008 practice questions, page 16 of 35, with answer review and explanations.

Question 76

Which of the following ports is commonly used by VoIP phones?

  1. 20
  2. 143
  3. 445
  4. 5060

Question 77

A network engineer is investigating reports of poor network performance. Upon reviewing a report, the engineer finds that jitter at the office is greater than 10ms on the only WAN connection available. Which of the following would be MOST affected by this statistic?

  1. A VoIP sales call with a customer
  2. An in-office video call with a coworker
  3. Routing table from the ISP
  4. Firewall CPU processing time

Question 78

A network technician needs to ensure outside users are unable to telnet into any of the servers at the datacenter. Which of the following ports should be blocked when checking firewall configuration?

  1. 22
  2. 23
  3. 80
  4. 3389
  5. 8080

Question 79

A technician is writing documentation regarding a company's server farm. The technician needs to confirm the server name for all Linux servers. Which of the following commands should the technician run?

  1. ipconfig
  2. nslookup
  3. arp
  4. route

Question 80

A technician is connecting multiple switches to create a large network for a new office. The switches are unmanaged Layer 2 switches with multiple connections between each pair. The network is experiencing an extreme amount of latency. Which of the following is MOST likely occurring?

  1. Ethernet collisions
  2. A DDoS attack
  3. A broadcast storm
  4. Routing loops