Operating Systems (OS)

Defination

This is a software designed to control the hardware of a specific data-processing system in order to allow users and application programs to make use of the system. It can be said that it links the software hardware to USERS who interact with it using applcation programs.

Application of operating systems

Operating systems are commonly used in:

Personal computers
Mobile phones
Robots
Smart T.Vs
Smart phones
Tablets
Smart watches
P.L.Cs
Motor vehicles
Embed systems

etc

Comments

CCNA3 v4.0 Final Exam Answers Updated 2013 100%

1. Refer to the exhibit. A network administrator needs to add IP phones to the network. To which devices should the IP phones connect? AS1 and AS2 DS1 and DS2 DS1, DS2, and CS1 AS1, AS2, DS1, and DS2 2. Which CLI mode allows users to access all device commands, such as those used for configuration, management, and troubleshooting? user EXEC mode privileged EXEC mode global configuration mode interface configuration mode 3. Refer to the exhibit. Which Spanning Tree Protocol version is in effect? Per VLAN Spanning Tree (PVST) Per VLAN Spanning Tree + (PVST+) Common Spanning Tree (CST) Rapid Spanning Tree Protocol (RSTP) Multiple Spanning Tree Protocol (MSTP) 4. Refer to the exhibit. A network administrator has segmented the network into two VLANs and configured Router1 for inter-VLAN routing. A test of the network, however, shows that hosts on each VLAN can only access local resources and not resources on the other VLAN. What is the most likely cause of this pr...

CCNA 2 EROUTING version 4 2013 FINAL EXAM ANSWERS 100%

CCNA 2 Final Exam 2013 v 4 1. Refer to the exhibit. A network engineer removes a new router from the shipping container and powers on the router to ensure it passes POST. Which port would the engineer use to perform the initial configuration? AUX console FE0/0 FE0/1 2. What is the purpose of the TTL field within an IP packet header? clears an unreachable route from the routing table after the invalid timer expires prevents regular update messages from inappropriately reinstating a route that may have gone bad removes an unreachable route from the routing table after the flush timer expires limits the period of time or number of hops a packet can traverse through the network before it should be discarded used to mark the route as unreachable in a routing update that is sent to other routers 3. When would the network administrator use the ip bandwidth-percent eigrp as-number percent command? when there is a low bandwidth connection when the co...

CCNA 1 Final Examv3 Answers 2013

1. Refer to the exhibit. While configuring a network, a technician wired each end of a Category 5e cable as shown. Which two statements are true about this setup? (Choose two.) The cable is suitable for connecting a switch to a router Ethernet port. The cable is suitable for connecting dissimilar types of devices. The cable is unusable and must be rewired. The cable is terminated in a way that the transmit pin is wired to the receive pin. The cable simulates a point-to-point WAN link. 2. Due to a security violation, the router passwords must be changed. What information can be learned from the following configuration entries? (Choose two.) Router(config)# line vty 0 3 Router(config-line)# password c13c0 Router(config-line)# login The entries specify three Telnet lines for remote access. The entries specify four Telnet lines for remote access. The entries set the console and Telnet password to “c13c0″. Telnet access will be denied because the Telnet ...

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