Author: upravnik

IOS includes a built-in FTP client that can be used to transfer images to and from the Cisco device. Unlike TFTP, FTP supports authentication, and you will need to provide a valid FTP server username and password. The following steps Read More …

Before upgrading IOS, you need to obtain the latest IOS version. This is usually done by logging in at https://software.cisco.com/ and selecting your device type and version. The downloaded file must then be transferred to a flash drive of the Read More …

If you have multiple interfaces that need to be configured with the same settings, you can use the interface range command to specify a range of interfaces to which the subsequent commands will be applied. For example, let’s say that Read More …

By default, Cisco switches will auto-negotiate the speed and duplex settings. When you connect a device (either a switch, router, or a workstation) to a port on a Cisco switch, the negotiation process will occur and the devices will agree Read More …

Cisco devices usually use integrated flash memory to store IOS software images and other files (e.g. backup configuration files). The startup configuration is stored in NVRAM. For each memory device available on the device, a file system called IOS file Read More …

Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol defined in IEEE standard 802.1AB. Just like Cisco’s CDP, LLDP is used by network devices to advertise their identity, capabilities, and neighbors on a local Ethernet network. However, since Read More …

Although Cisco switches dynamically build the MAC address table by using the source MAC address of the received frames, you can also manually add a MAC address to the switch’s MAC address table. The static MAC entries will be retained Read More …

NOTE This topic is not included in the latest version of the CCNA exam (200-301). If you are studying for the exam feel free to skip this article.   To allow interVLAN communication, you can divide a single physical interface Read More …

NOTE This topic is not included in the latest version of the CCNA exam (200-301). If you are studying for the exam feel free to skip this article.   Each VLAN is its own subnet and broadcast domain, which means Read More …

By default, Cisco switches forward Ethernet frames without any configuration. This means that you can buy a Cisco switch, plug in the right cables to connect various devices to the switch, power it on, and the switch will work properly. Read More …