Cisco 7200 Series Memory - 512MB for NPE-400 MEM-NPE-400-512MB= Benutzerhandbuch

Nonvolatile random-access memory (NVRAM)—Stores the system configuration, environmental 
monitoring logs, and the virtual configuration register.

Cache memory—Memory with fast access and small capacity used to temporarily store recently 
accessed data; found either incorporated into the processor or near it. 

DIMM—dual in-line memory module

DRAM—dynamic random-access memory

Instruction and data cache memory—Instructions to the processor, and data on which the 
instructions work.

Integrated cache—Cache that is built into the processor; sometimes referred to as internal cache. 
Cache memory physically located outside the processor is not integrated, and is sometimes referred 
to as external cache.

Primary, secondary, tertiary cache memory—Hierarchical cache memory storage based on the 
proximity of the cache to the core of the processor. Primary cache is closest to the processor core 
and has the fastest access. Secondary cache has slower access than primary cache, but faster access 
than tertiary cache. 

OTP—one time programmable

RAM—random-access memory 

RISC—reduced instruction set computing

ROM—read-only memory

SIMM—single in-line memory module

SODIMM—small outline dual in-line memory module

SDRAM—synchronous dynamic random-access memory

SDRAM-fixed—SDRAM that is a fixed size or quantity; can be replaced, but not upgraded.

SRAM—static random-access memory

Unified cache—Instruction cache and data cache are combined. For example, a processor may have 
primary cache with separate instruction and data cache memory, but unified secondary cache.