Cloud Infrastructure Chapter 4

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Which of the following is NOT a benefit of using VLANs?

A. Performance

B. Reduced costs

C. Security

D. Reduced network complexity

Answer: D. Reduced network complexity

What increases as compression reduces the size of transmitted data?

A. Routing complexity

B. Available bandwidth

C. Cloud ingress network traffic costs

D. Cloud egress network traffic costs

Answer: B. Available bandwidth

Your organization plans to use iSCSI for shared network storage. Which technique should be used to ensure that iSCSI traffic is kept separate from other IP traffic?

A. LUN masking

B. VLANs

C. Zoning

D. Load balancing

Answer: B. VLANs

Users complain that Internet access has been intermittent. You check the configuration of a user system and discover it has an IP address beginning with 169.254. What is the problem?

A. The DHCP server cannot be reached.

B. The default gateway cannot be reached.

C. The DNS server cannot be reached.

D. The proxy server cannot be reached.

Answer: A. The DHCP server cannot be reached.

Andrew is a cloud network administrator. Cloud-based virtual machines hosting a custom web application have been deployed to a single cloud virtual network that currently has no Internet access. Each virtual machine must have Internet access, while incoming connections initiated from the Internet must be blocked. Which solution should the administrator deploy?

A. Forward proxy host

B. Packet filtering firewall

C. Web application firewall

D. NAT

E. Host based firewall

Answer: D. NAT

Lisa is responsible for a web application running in the public cloud. Recent performance metrics indicate that the average user wait time for page loads is four seconds due to the high number of HTTP requests. What should she configure?

A. Compression

B. Load balancing

C. Proxying

D. PKI

Answer: B. Load balancing

A client web browser connects to an HTTPS web server. Which port does the server use to communicate back to the client?

A. 81

B. 444

C. Any port below 1024

D. Any port above 1024

Answer: D. Any port above 1024

Which of the following is a disadvantage of network compression?

A. Higher storage requirements

B. Longer transmission time

C. Higher compute requirements

D. Shorter transmission time

E. Higher latency

Answer: C. Higher compute requirements

This protocol is responsible for transferring e-mail messages from one mail server to another over the Internet.

A. DNS

B. HTTPS

C. FTP

D. SMTP

Answer: D. SMTP is used to transfer e-mail messages from one e-mail server to another over the Internet.

Which of these ports is the well-known port for the Telnet service?

A. 25

B. 22

C. 23

D. 443

Answer: C. Telnet uses port 23 by default for its communication.

In a network environment _ is responsible for assigning IP addresses to computers and _ is responsible for resolving those IP addresses to names.

A. DNS, DHCP

B. DHCP, DNS

C. HTTP, DNS

D. DHCP, SMTP

Answer: B. DHCP is responsible for assigning IP addresses to computers and DNS is responsible for resolving those IP addresses to names.

SFTP uses _________ to secure FTP communication.

A. Certificates

B. FTPS

C. SSH

D. SMTP

Answer: C. SFTP uses SSH keys to secure FTP communication.

Which of the following protocols and ports is used to secure communication over the Internet?

A. HTTP over port 80

B. SMTP over port 25

C. FTP over port 21

D. HTTPS over port 443

Answer: D. HTTPS is an extension of HTTP that provides secure communication over the Internet and uses port 443 by default.

Which of the following technologies allows you to logically segment a LAN into different broadcast domains?

A. MAN

B. WAN

C. VLAN

D. SAN

Answer: C. A VLAN allows you to configure separate broadcast domains even if the devices are plugged into the same physical switch.

Which of the following IP addresses is in a private IP range?

A. 12.152.36.9

B. 10.10.10.10

C. 72.64.53.89

D. 173.194.96.3

Answer: B. 10.0.0.0-10.255.255.255 is a private class A address range.

Which process allows a router to modify packets so that multiple devices can share a single public IP address?

A. NAT

B. DNS

C. VLAN

D. Subnetting

Answer: A. NAT allows your router to change your private IP address into a public IP address so that you can access resources that are external to your organization; then the router tracks those IP address changes.

You administer a website that receives thousands of hits per second. You notice the web server hosting the website is operating at close to capacity. What solution would you recommend to improve the performance of the website?

A. Caching

B. Network load balancing

C. Compression

D. Network bandwidth

Answer: B. Network load balancing is used to increase performance and provide redundancy for websites and applications.

After taking a new job at the state university, you are asked to recommend a network topology that best fits the large college campus. The network needs to span the entire campus. Which network topology would you recommend?

A. LAN

B. WAN

C. MAN

D. SAN

Answer: C. A metropolitan area network (MAN) can connect multiple LANs and is used to build networks with high data connection speeds for cities or college campuses.

Which of the following causes network performance to deteriorate and delays network response time?

A. Network latency

B. Caching

C. Network bandwidth

D. High CPU and memory usage

Answer: A. Network latency is a time delay that is encountered while data is being sent from one point to another on the network and impacts network bandwidth and performance.

Which of the following terms defines the amount of data that can be sent across a network at a given time?