Linux and networking

CCNA admin interview questions Networking interview questions 1.You need to retrieve a file from the file server for your word processing application, which layer of the OSI model is responsible for this function? 1.Presentation layer 2.Application layer 3.Session layer 4.Transport layer 5.Datalink layer 2.You are working in a word processing program, which is run from the file server. Your data comes back to you in an unintelligible manner. Which layer of the OSI model would you investigate? 1.Application layer 2.Presentation layer 3.Session layer 4.Network layer 5.Datalink layer 3.The IEEE subdivided the datalink layer to provide for environments that need connectionless or connection-oriented services. What are the two layers called? 1.Physical 2.MAC 3.LLC 4.Session 5.IP 4.You are working with graphic translations. Which layer of the OSI model is responsible for code formatting and conversion and graphic standards. 1.Network lay...

Boot sequence summary When a PC is booted it starts running a BIOS program which is a memory resident program on an EEPROM integrated circuit. The BIOS program will eventually try to read the first sector on a booting media such as a hard or floppy drive. The boot sector contains a small program that the BIOS will load and attempt to pass run control to. This program will attempt to read the operating system from the disk and run it. LILO is the program that Linux systems typically use to give users a choice of operating systems to run. It is usually installed in the boot sector which is also called the master boot record. If the user chooses to boot Linux, LILO will attempt to load the Linux kernel causing the following basic events to happen: BIOS Load boot sector from one of: • Floppy • CDROM • Hard drive The boot order can be changed from within the BIOS. BIOS setup can be entered by pressing a key during bootup. The exact key depends varies, but is often one of D...

Introduction The File Transfer Protocol (FTP) is used as one of the most common means of copying files between servers over the Internet. Most web based download sites use the built in FTP capabilities of web browsers and therefore most server oriented operating systems usually include an FTP server application as part of the software suite. Linux is no exception. This chapter will show you how to convert your Linux box into an FTP server using the default Very Secure FTP Daemon (VSFTPD) package included in Fedora. FTP Overview FTP relies on a pair of TCP ports to get the job done. It operates in two connection channels as I'll explain: FTP Control Channel, TCP Port 21: All commands you send and the ftp server's responses to those commands will go over the control connection, but any data sent back (such as "ls" directory lists or actual file data in either direction) will go over the data connection. FTP Data Channel, TCP Port 20: This port is used for all subs...