NETC-240 Test 1 study guide
1. Explain the different between IAAS and SAAS. Provide an example of each
2. Explain the tradeoffs between running your own server and using a cloud based VM.
3. What is the specific risk with running a VM in a multitenant cloud?
4. List the rules in a Security group to allow the following:
a. RDP from any IP in the range 70.0.0.0 to 80.0.0.0
b. Allow FTP from any IP in the range 70.70.58.21 to 70.70.59.254
c. Allow HTTP from any IP except 66.161.1.0/24
d. Allow SSH from the first 10 IP addresses starting with 66.161.1.0
5. What are the key aspects provided by a Cloud provider?
6. How can outbound IP traffic be restricted from an Instance?
7. How is Terminating/Deleting an Instance different than Shutting down an Instance, in terms of cost?
8. If you have two Instances running in Azure or Google, how would they have to be provisioned so that they are able to ping each other using their private IP addresses? Assume the firewall settings of the instance allows this.
9. Create a troubleshooting flowchart that shows the specific steps you would follow in troubleshooting a potential problem with a web server running in an Azure instance. Imagine getting a tech support call that someone indicates that they can’t get to the website or that it may not be running.
10. How are Cloud regions different than Availability zones?
11. In the online article “Murder in the cloud (week2 content), how could you prevent this type of problem from occurring?
12. In telephony, what is a Central Office ?
13. What resulted from the 1984 Bell antitrust suit? Note, there were several things
14. How is problem solving/troubleshooting different if you use a CLEC compared to an ILEC, if you had a service problem?
15. What are several of the typical features of a PBX?
16. Explain how an IP PBX reduces costs for moves, adds and changes for an organization
17. Explain why Asterisk was a disruptive technology. What did it disrupt?
18. What is a Hunt group?
19.What potential issue can come up when a small organization is using multiple POTS lines configured in a Hunt group?
20. What is the most popular CODEC used in VoIP?
21. Explain how Direct Inward Dialing works. Why might an organization find this valuable?
22. In telephony, what is a trunk line?
23. What is the major potential issue with calls to 911 from a VoIP phone?
24. In 3CX, explain the following:
a. What is a trunk?
b. What do Inbound and Outbound rules do? How does each one work?
c. How is “parking” a call different than putting a call on hold from an extension?
25. In VoIP, SIP, SDP and RTP are all used. Explain the specific role and how each protocol is used.
26. How can Wireshark be used (specific details) in investigating VoIP problems?
27. What are the potential legal issues with recording phone calls?