Networking I
Company K has a sales force that typically uses insecure wireless networks in hotels and coffee shops. You advise the salespeople start using this to enhance security.
What is a VPN (Virtual Private Network)? A VPN creates a secure “tunnel” for carrying network traffic through insecure connections.
You are at a client’s location preparing to install an update to Windows. Their Internet connection goes down. You use this to install the update immediately.
What is mobile hotspot/tethering?
The memory used by programs as they are running.
What is RAM?
A computer that is walled off from the physical computer on which it is running.
What is a virtual machine?
Step 1 of the troubleshooting methodology.
What is identifying the problem?
A user reports that she can connect to insecure websites (http://) but not to secure websites (https://). You think this port is being blocked by a firewall.
What is port 443? (This port is used for HTTPS/secure HTTP)
Your client wants to build a network that will connect locations in various parts of a medium-sized city with each other.
What is a metropolitan area network (MAN)? A MAN connects locations in a single city that might be separated by some blocks of distance.
You suspect that an attempt to gain unauthorized access to a network printer was made recently. You want to investigate this security event so you use this tool to scan the audit logs on a Windows system.
What is the Event Viewer? The Event Viewer supports the viewing, selecting, and reporting of system, security, and application events on a Windows computer.
The type of cloud strategy of a company that uses several SaaS products such as Gmail and Google Docs, along with a customized private cloud for its proprietary apps.
What is a hybrid cloud?
A hybrid cloud combines public cloud (in this case, SaaS) and private cloud solutions.
A type of printer that may display dark ghost patterns when malfunctioning.
What is a laser printer?
Microsoft IIS and Apache are examples of this type of server.
What is a web server?
Your client is reporting problems with some of their network cables. Unfortunately, none of the cables are labeled so you use this tool to help identify the client’s cables.
What is a toner probe? A toner probe helps determine which wire is which.
The process of aligning the text, graphics, and colors of a printer.
What is calibrating?
The capability of a cloud service to expand or contract its resources, as required, to serve a subscriber’s needs.
What is rapid elasticity?
Rapid elasticity in a cloud environment is the ability to increase or decrease committed resources, as needed, to meet a subscriber’s processing or storage requirements.
A user reports paper jams at the rear of the printer when he tries to print double-sided pages. You think this printer component is most likely the cause.
What is a duplexer?
The duplexer at the rear of the printer is used to flip the paper for printing on the reverse side.
Your client’s network is able to receive e-mail but unable to send it. You think this protocol is disabled or blocked by mistake.
What is SMTP (Simple Mail Transfer Protocol)?
Your client’s 2.4-GHz network once ran very quickly. However, several new houses have been built nearby and network performance is now very poor. You use this tool to help determine if different settings are needed.
What is a Wi-Fi analyzer?
A Wi-Fi analyzer displays the activity on the 2.4-GHz band by channel and router name.
Your client wants to choose a RAID array type that offers excellent speed and reliability. It needs to have mirroring for data protection and striping for speed. You think this RAID is the best match for this requirement.
What is RAID 10?
RAID 0 is faster than other RAID types because data is striped across two drives; it has no redundancy. RAID 1 mirrors the contents of one drive to the other. RAID 5 uses at least three drives and distributes data and recovery (parity) information across all drives. RAID 10 or RAID 1+0 combines mirroring for data protection and striping for speed.
Your company is looking for a service arrangement that gives access to unlimited resources to support on-demand swings in resource requirements but charges only for the resources actually used.
What is metered utilization?
Metered utilization provides unlimited access to resources on a pay-for-what-you-use basis.
The primary cause for poor quality service on a VoIP network
What is jitter?
Jitter is the variation in time delay between when a signal is transmitted and when it's received over a network connection, measuring the variability in ping. This is often caused by network congestion, poor hardware performance and not implementing packet prioritization.
A DHCP-provided IP address that never changes.
What is an IP reservation?
All network adapters can use this to determine which device a frame is sent from or going to.
What is a MAC address?
You have been tasked with reviewing motherboard form factors for a project. The number-one requirement is that the motherboard be as small as possible so you go with this type of motherboard.
What is an ITX motherboard?
The mini-ITX (or mITX) is the largest at 6.7 inches square. The nano-ITX motherboard, at 4.7 inches square, and the pico-ITX motherboard, at 3.8 inches by 2.8 inches, are smaller yet.
A virtual machine (VM) environment used to test out new programs in an isolated area away from critical servers and resources.
What is type 2 virtualization?
Type 2 virtualization runs within an installed operating system and relays requests to the hardware to the host operating system, whereas Type 1 virtualization directly interfaces with the computer’s hardware.
A cause for overheating that can be tested in the system BIOS/UEFI settings.
What is a slow CPU fan speed?
The BIOS/UEFI screen, commonly called PC Health or Hardware Monitor, displays fan speeds as well as system temperature.