3.2 - An Overview of Memory Flashcards
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What is RAM and how does it differ from SSD or hard drive storage?
RAM (Random Access Memory) is high-speed temporary storage used to load applications and documents, whereas SSDs and hard drives are for long-term storage.
What does DIMM stand for and what is its purpose?
DIMM stands for Dual In-line Memory Module, and it refers to memory modules used in computers, which have connectors on both sides that differ.
What is a SO-DIMM and where is it commonly used?
SO-DIMM stands for Small Outline Dual In-line Memory Module, and it is used in laptops and other mobile devices due to its smaller size compared to full-sized DIMMs.
How does the size of SO-DIMM compare to DIMM?
SO-DIMM is about half the width of a standard DIMM, making it suitable for devices with limited space.
What is dynamic random access memory (D-RAM) and why does it need to be refreshed?
D-RAM is the type of RAM that needs constant refreshing to maintain data because it loses data when power is off.
What does ‘synchronous’ mean in the context of RAM?
Synchronous RAM means it operates with a clock that regulates the timing of data transfers in and out of the memory modules.
How do notches on memory modules prevent incorrect installation?
Notches ensure that only compatible memory modules can be installed in specific slots, preventing the use of incorrect memory types.
What is the difference between single data rate (SDR) and double data rate (DDR) memory?
SDR memory transfers data once per clock cycle, while DDR memory transfers data twice per clock cycle, effectively doubling the data transfer rate.
How does DDR3 memory improve upon DDR2?
DDR3 memory provides faster data rates and increased maximum capacity per module compared to DDR2, with up to 16 gigabytes per module.
What are the advancements of DDR4 over DDR3?
DDR4 memory increases speed and allows up to 64 gigabytes per module, but is not backwards compatible with DDR3.
What improvements does DDR5 offer over DDR4?
DDR5 offers faster throughput and maintains a maximum module size of 64 gigabytes, with an updated notch for compatibility with DDR5-specific motherboards.
Describe an LC fiber optic connector. What makes it distinct?
An LC (local connector) fiber optic connector is a small connector with two separate fiber connections inside, used for transmit and receive or as separate strands.
What is an ST connector and how does it connect?
An ST (straight tip) connector uses a bayonet connection with a quarter turn to lock into place and is characterized by its long ferrule.
What is an SC connector and what are its characteristics?
An SC (subscriber connector) fiber optic connector has a square shape and can be used in combined or separate configurations.
