Before we discuss the memories that are used in a Cisco router, let’s understand what basically a Router is. Show When we want to connect two or more IP networks or subnetworks together, then a piece of hardware is needed and that hardware is called a Router. It generally serves two purposes:
PC1 and PC2 are connected to a router that is connected to Internet Service. How does Router work? Each data packet has a distinct destination and travels a distinct path to get there and these packets are guided by the router. The router also ensures that each data packet is successfully delivered to its destination without any interference in between the transmission. The best route is selected with the help of routing protocols like RIP(Routing Internet Protocol) /OSPF(Open Shortest Path First). A routing table is used by the router internally where both the static (these types of addresses are assigned by the ISP(Internet Service Provider) and these types of addresses do not change) as well as dynamic addresses (these types of addresses are assigned using DHCP(Dynamic host configuration Protocol) and these addresses change over time, they are not fixed) are stored. Different types of Memories in a Router : 1. Random Access Memory (RAM) –
Whenever the Router is rebooted or restarted, all the data, all the information that is stored in the RAM gets removed or deleted. The data gets deleted because all the information in the RAM is temporarily stored in a router. We can permanently store the data in NVRAM. 2.
Non-Volatile Random Access Memory (NVRAM) : 3. Read-Only Memory (ROM) : 4. Flash Memory : Summarizing different memories that are used in Cisco Router –
What type of memory is used to store the configuration of the router?The configuration file can be stored in a variety of places, including two inside a router. The router has a couple of other types of memory as well: RAM—Sometimes called DRAM for dynamic random-access memory, RAM is used by the router just as it is used by any other computer: for working storage.
What type of switch memory is used to store the configuration used by the switch when it is up and working?The NVRAM (Non-Volatile RAM) stores the start-up configuration file.
Where does the running configuration file of the router be stored?There are two configurations stored in a Cisco router; the startup configuration is stored in nonvolatile RAM (NVRAM) and is only read when the router “starts” up; the other is the running configuration and it is stored in RAM while the router is operating.
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