How does Router work?
The router routes data packets, each of which has a specific destination and follows a certain route to get there. The Router also ensures that every data packet reaches its destination successfully and without delay between transmissions. Routing protocols like RIP (Routing Internet Protocol) and OSPF are used to find the optimum route (Shortest Path First). If you are here to know, What types of memories does a Cisco router use (CCNA)? You can join the CCNA Course in Chennai at FITA Academy.
Random Access Memory (RAM)
A router’s Random Access Memory (RAM) is comparable to the RAM found in our computers, cell phones, and laptops. RAM is split into two sections:
- The operating network configuration (commands we are running), the routing table, and the ARP (Address Resolution Protocol) cache are all kept in the main processor memory.
- Queued data packets are kept in shared I/O memory, which also serves as temporary storage memory.
The data and information in the RAM will be erased or removed if the Router is restarted. Data is erased because all RAM information is stored in a router. In NVRAM, data can be permanently saved.
Non-Volatile Random Access Memory (NVRAM)
The starting configuration file is kept in NVRAM. After the Router is rebooted or restarted, initial configuration files—copies of the Cisco network configuration file—are kept.
When data is stored in NVRAM, it can be easily recovered even if the Router is restarted or turned off. You can copy running configuration files from RAM to NVRAM if you want to preserve them permanently. Searching for the best CCNA Course Online? Well-experienced trainers at FITA Academy provide CCNA courses for the students to get high scores.
Read-Only Memory (ROM)
A Cisco router begins its boot procedure in the ROM memory region. ROM provides programming instructions like the bootstrap programme and POST (Power-On-Self-Test). The POST test is used to determine whether or not hardware elements such the CPU, RAM, and ports are functioning correctly.
POST returns an error code if they do not function properly. Following that, the startup utility is used to configure the Router’s CPU and reset functions.
The bootstrap programme is in charge of detecting and loading the operating system on the Router (IOS). All of this information is saved in ROM, and the data is retained even if the Router is turned off or restarted.
It is a programmable erasable read-only memory chip (EPROM). The Router’s operating system, IOS (Internet Operating System), is stored in flash memory.
It is quickly upgradeable and doesn’t need to change the hardware, unlike ROM. When the router is restarted or turned off, the content is kept in flash memory.
A summary of the various memories used by Cisco Router
- RAM stores the tasks that are currently active.
- NVRAM is where startup configuration occurs.
- The ROM contains POST and bootstrap programme information.
- And Flash Memory, which contains the Router IOS operating system. CCNA Course In Bangalore provides in-depth & practical training to get placed in top companies.
Read more: What is a Router in CCNA?