Chapter 8 - Network Services, Virtualization, and Cloud Computing Flashcards
Your company hosts its own web server, and it allows consumers to make purchases via the server. The help line has been getting complaints that users are unable to access the website. You open the site from an internal workstation and it seems fine. What is the most likely cause?
A. The firewall is blocking TCP port 23.
B. The firewall is blocking TCP port 443.
C. The security module of the web server is malfunctioning
D. The web server is down
B. For secure transactions, the web server will be using HTTPS, which uses port 443. If the website works from an internal workstation, then the server is fine. It’s most likely that the firewall is blocking inbound traffic on port 443. Port 23 is Telnet.
Your manager wants you to install a networked Internet appliance that prevents network traffic-based attacks and includes antimalware and antispam software. What should you install?
A. Spam gateway
B. Load balancer
C. UTM
D. Proxy server
C. It sounds like the manager wants a unified threat management (UTM) device. They are designed to be one-stop network protection devices. Spam gateways help with spam email but not with other malware. A load balancer spreads work around to multiple servers. A proxy server fulfills requests for clients.
You are installing a file server for the accounting department. Where should this file server be located on the network?
A. Outside of the firewall
B. In the screened subnet
C. In the secure network
D. On the router
C. If the data on the server does not need to be accessed via the Internet, then the server should be in the most secure lace possible, which is inside the firewall(s) in the secure network.
You have been asked to identify the right type of cloud service to help the team of developers to provide programming elements such as runtime environments. Which service do you recommend?
A. PaaS
B. IaaS
C. SaaS
D. DaaS
A. Platform as a service (Paas) is probably the right level of service for the developer team. It provides infrastructure, like IaaS, and also supplies needed programming elements. Infrastructure as a service doesn’t provide runtime environments; think of it as hardware. Software as a service provides apps and is too high a service for what’s needed here. There is no current DaaS on the exam objectives.
Which of the following are services that a print server should provide? (Choose two.)
A. Accepting print jobs from clients
B. Turning off printers on demand
C. Providing clients with the appropriate printer driver during installation
D. Notifying users when the print job is complete
A, C. Print servers should make printers available to clients and accept print jobs. They also process print jobs and manage print priorities. Finally, they provide client computers with the right print drivers when the clients attempt to install the printer. They do not turn printers off on demand or provide notification that a job has printed.
You are setting up a cloud contract with a provider. Your team needs the ability to quickly increase capacity to meet peak demands. What do you request?
A. Rapid elasticity
B. High availability
C. Resource pooling
D. Metered utilization
A. The ability to expand services quickly means rapid elasticity. High availability guarantees uptime for services. All cloud services use resource pooling. Metered utilization is how many suppliers track usage and charge accordingly.
Which type of server is responsible for preventing users from accessing websites with objectionable content?
A. Proxy
B. Web
C. DHCP
D. DNS
A. - A proxy server can be configured to block access to websites that contain potentially dangerous or inflammatory material. Web servers host web pages, some of which may have objectionable content. DHCP servers provide clients with IP addresses, and DNS servers resolve hostnames to IP addresses.
Your company wants to move to cloud provider to be able to scale resources quickly, but it is concerned about the security of confidential information. Which of the following types of cloud models might be the most appropriate for your company?
A. Public
B. Private
C. Community
D. Hybrid
D. - A hybrid could provides the best of public and private clouds. you get the scalability and cost effectiveness of a public cloud but also the security that you need for important files on the private portion of the cloud.
What does a DHCP server need to be configured with to operate properly?
A. DNS server
B. Scope
C. Range
D. DHCP relay agent
B. Every DHCP server needs to have a scope, which is the range of addresses available to clients, as well as other options that it can give to client computers. A DHCP server can optionally provide clients with the address of a DNS server. There is no DHCP range. A DHCP relay agent is a system configured on a subnet no DHCP server that relays DHCP requests to the DHCP server.
You have been asked to advise a group of several universities that want to combine research efforts and store data in the cloud. Which type of cloud solution might be best for them?
A. Public
B. Private
C. Community
C. When multiple organizations with similar objectives want to combine efforts in a cloud, the best choice is generally a community cloud. This allows for the flexibility and scalability normally found in a public cloud, but it also limits the number of users to a smaller, trusted group.
When configuring a DNS server, administrators must create which of the following?
A. Zone file
B. Hosts file
C. Scope file
D. DNS proxy
A. DNS server records are contained in the zone file, which must be configured by administrators. A hosts file is an alternative to using DNS (but that does not work well when scaling to the Internet). A scope is created on DHCP servers. There is no DNS proxy.
Your manager wants to use the cloud because everyone seems to be talking about it. What should you include when you are listing the benefits of using the clou? (Choose all that apply.)
A. Increased security
B. Increased scalability
C. Lower cost
D. Improved reliability
B, C, D. Cloud solutions are great for enhancing scalability and reliability while generally lowering costs. Security could be an issue with cloud computing, depending on your organization’s needs, because the resources aren’t locally controlled and managed.
You are configuring two email servers on your company’s network. Which network protocol do the servers use to transfer mail to each other?
A. POP3
B. IMAP4
C. SNMP
D. SMTP
D. Simple Mail Transfer Protocol (SMTP) is used to transfer (send) email between servers. POP3 and IMAP4 are used to download (receive) email. SNMP is Simple Network Management Protocol and not related to email.
You have been asked to configure a client-side virtualization solution with three guest OSs. Each one needs Internet access. How should you configure the solution in the most cost effective way?
A. Three physical NICs
B. One physical NIC, Three virtual NICs, and one virtual switch
C. One physical NIC, one virtual NIC, and three virtual switches
D. One physical NIC, three virtual NIC, and three virtual switches
B. Each virtual machine will use its own virtual NIC, so you need three virtual NICs. The virtual NICs will communicate with one virtual switch managed by the hypervisor. The virtual switch will communicate with one physical NIC on the host system.
You have five web servers that manage requests for online purchases. An administrator notices that one of the servers is always busy while another is idle, and the company is getting some online complaints about the slow website. Which of the following servers will help fix this?
A. DNS
B. DHCP
C. Proxy
D. Load Balancer
D. - A load balancer can spread the work around to multiple servers. It accepts the inbound request and then sends it to the most appropriate web server. DNS resolves hostnames to IP addresses. DHCP provides IP configuration information. A proxy makes requests (usually outbound) on behalf of clients.
