Which of the Following Types of Lans Was a Competitor of Ethernet Lans from the Earliest Days of Wired Lans in the 1980s and Into the 1990s

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JAMES MINOR 5/7/13 UNIT 7 ASSIGNMENT 1 VIDEO SUMMARY 5 CLIP 1.01 BIOS * FIRST PROGRAM ACTIVATED DURING BOOT * ROM (READ ONLY MEMORY) * PERMANENT * CANNOT BE DELETED * DOES NOT REQUIRE POWER TO MAINTAIN CONTENT POST * BOOTSTRAP LOADER INITIATES POST * POWER ON SELF TEST * CHECKS BASIC SYSTEM HARDWARE * CHECKS MEMORY * ASSIGNS SYSTEMS RESOURCES CMOS * STARTUP BIOS CHECKS CMOS * COMPARES TO POST * RAM (RANDOM ACCESS MEMORY) * NOT PERMANENT * MAY BE CHANGED BIOS AND CMOS ARE DIFFERENT * BIOS STORED IN ROM, PERMANENT AND CANNOT BE DELETED * CMOS STORED IN RAM, VOLITILE AND CAN BE EDITED * STORED IN RAM * RAM CONTENTS ARE LOST ON POWER FAILURE * CMOS SURVIVES COMPUTER SHUTDOWN WHY ARE CMOS SETTINGS NOT LOST? * THE CMOS BATTERY * PROVIDES POWER DURING SHUTDOWN * PRESERVES CMOS CONFIGURATION * IF BATTERY DIES, CMOS CONFIGURATIONS WILL BE LOST THE SYMPTOMS ARE * LOW BATTERY=SLOW CLOCK * DEAD BATTERY= CHECKSUM ERROR DURING BOOT * CHECK CHECKSUM ERROR * BIOS WILL USE SETTINGS IN ROM FLASHING THE BIOS MAKING CHANGES TO THE BIOS * ARE PERMANENT * CANNOT BE DELETED * THEY CAN BE CHANGED BY NEW MOTHERBOARD OR FLASH THE BIOS * FIRMWARE/ NOT HARD/SOFTWARE * EEPROM * NEW BIOS/ DOWNLOAD A COPY CLIP 1.02 IRQ * INTERRUPT REQUEST * COMMUNICATION CHANNEL FROM HARDWARE DEVICE TO CPU * EACH DRIVE HAS IT’S OWN IRQ CHANNEL MOST COMMON IRQ CONFLICTS * IRQ3-COMP2, COMP4 * IRQ4-COMP1, COM3 * IRQ5-LPT2 OR SOUNDCARD * IRQ7-LPT1 (PRINTER) IO ADDRESS * INPUT/OUTPUT ADDRESS * HARDWARE DEVICE ASSIGNED ADDRESS * CPU SENDS INSTRUCTIONS TO ADDRESS * DEVICE LISTENS FOR ADDRESS * I/O ADDRESS SIMILAR TO DEVICE NAME * CPU COMMUNICATES WITH HARDDRIVE * USES HARD DRIVE’S I/O ADDRESS * HARD

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