JNCIA-Junos EXAM QUESTIONS AND ANSWERS

What is a network? - Answer- A conduit that connects two or more computers or other devices What are two kinds of networks? - Answer- LAN WAN Local Area Network (LAN) - Answer- A group of computers on a single, geographically limited network Wide Area Network (WAN) - Answer- Network that connects LANs over large geographic distances Open System Interconnection (OSI) - Answer- Identifies seven layers of functionality computers use to communicate over a network. Does not define protocols. The seven layers of OSI model combined is sometimes referred to as? - Answer- Network Stack Protocol - Answer- A formal set of rules or procedures computers must understand, accept, and use to be able to communicate over a network Ex: TCP, UDP, SNMP TCP/IP Model - Answer- application, transport, internet, network access -Defines specific protocols at each layer Five Layer Model - Answer- Application, transport, network, data link, physical Application Layer Protocols - Answer- HTTP, FTP, DNS, SMTP Hypertext Transfer Protocol (HTTP) - Answer- Communication protocol for the transfer of information on the Internet and the World Wide Web -Used in the application layer File Transfer Protocol (FTP) - Answer- Used to transfer data from one computer to another through a network, (ex: Internet) -Used in the application layer