CompTIA N10-006 - Questions & Answers

An F connector is a coaxial RF connector commonly used for terrestrial television, cable television and universally forsatellite television and cable modems, usually with RG-6/U cable or, in older installations, with RG-59/U cable.

SaaS stands for Software as a Service. This is a cloud model whereby a service provider provides asoftware service and makes the service available to customers over the Internet. Examples of Saas include Microsoft Office 365, Microsoft Exchange Online, Microsoft Lync Online etc.
Advantages of Saas include ease of administration: no need to install andconfigure local servers, no need to configure backups, no need to keep the software patched, no need to worry about system recovery, lower costs: saving on the purchase of server hardware and software; with SaaS, you lease the service
paying either monthlyor yearly and compatibility by ensuring that all users are using the same version of software. There are two types of SaaS: public and private. With public Saas, multiple customers (usually companies) share the same servers running the software. Withprivate Saas, the servers running the software are dedicated to a single customer which provides the isolation and extra security required when dealing with sensitive information.

When using an iSCSI SAN (with iSCSI switching), we can improve network performance by enabling

`jumbo frames'. A jumbo frame is a frame with an MTU of more than 1500. By setting the MTU to 9000, there will be fewer but larger frames going over the network. Enabling jumbo frames can improve network performance by making data transmissions more efficient. The CPUs on switches and routers can only processone frame at a time. By putting a larger payload into each frame, the CPUs have fewer frames to process.

SOHO stands for Small Office / Home Office. A SOHO network istypically a small network. Being a small network, it is unlikely that it will have a datacenter or even a dedicated server room. Any servers installed in the network will still have the same environmental requirements as servers in a large network. The servers should be in a secure isolated area if required. The servers also need to be kept cool and dry.
Therefore, the first consideration in a SOHO office is "Environment limitations": where the servers and other network hardware will be located.

A reservation is used in DHCP to ensure that a computer always receives the same IP address. To create a reservation, you need to know the hardware MAC address ofthe network interface card that should receive the IP address. For example, if Server1 has MAC address of 00:A1:FB:12:45:4C and that computer should always get 192.168.0.7 as its IP address, you can map the MAC address of Server1 with the IP address to configure reservation.

A DB-9 connector is used on serial cables. Serial cables use the RS-232 protocol which defines the functions of the 9 pins in a DB-9 connector. The RS-232 standard was around long before computers. It's rare to see a new computer nowadays with a serial port but they were commonly used for connecting external analog modems, keyboards and mice to computers.

A DS3 (Digital Signal 3) is also known as a T3 line with a maximum bandwidth of 44.736 Mbit/s. DS3 uses 75 ohm coaxial cable and BNC connectors.