What are the Main Topics in CCNA?

CCNA Candidates will get training to recognize, design, and recommend the most effective Cisco systems for small & medium enterprises as part of this certification program. 

Here you can find out that ARP is a protocol that operates on the second layer. Its function encapsulates its entire name, Address Resolution Protocol, which explains what it does. To determine the MAC address of a piece of hardware, a PC will send out an ARP request. You can send ARP requests over the air. Also can produce a unicast form of an ARP with the PC whenever you ask to fulfill an ARP request. 

Also Read Cisco 200-301CCNA Everything You need to Know

The host machine receives an IP address that the DHCP server can automatically assign. We can manually configure the IP address while working with a small network; however, this is impossible when working with a larger network because we cannot give unique IP addresses to each machine. 

In order to cut down on layer two loops, you can use the spanning tree protocol. In most cases, you can install more links to guarantee the availability of the network. These additional links are classified as extra links in some circles. They perform the function of backup links, which implies that if any active link breaks, traffic will receive the backup links.

Both SSH and Telnet help to gain remote access to the device. SSH helps over Telnet because Telnet is less secure and transfers data and passwords in plain text, making it possible for anyone to view the passwords. On the other hand, SSH transfers encrypted data, making it impossible for anyone to view the actual data transfer. 

Gateway redundancy protocol is another name for the HSRP protocol. It is a protocol that is exclusive to Cisco. The HSRP protocol comes into load-balance the traffic. Enterprise networks typically have two internet connections from two different providers to maintain that connectivity around the clock. It accomplishes with the help of HSRP, which allows redirecting traffic to the other connection if the first connection becomes unavailable. There are two routers used in HSRP; one is used in active mode, and the other is used in standby mode. 

A dynamic protocol either discovers new routes on the fly or automatically updates its routing table whenever there is a shift in the topology of the network. 

Because the Transmission Control Protocol (TCP) is connection-oriented, a server can establish a link between the sender and the receiver before the actual transmission can begin. There is a specific process that you should follow in TCP that you can refer to as the 3-way handshake process to successfully create a connection. 

UDP is a protocol that does not require a connection. In addition, there is no acknowledgment that if a packet loses, it truly is gone forever. It cannot be easily relied on. Applications that use VoIP can benefit from UDP. 

HTTP is a protocol that runs on the application layer. HTTP helps to retrieve the contents of web pages from a web browser. 

The IEEE 802.1q protocol is mainly for tagging VLANs. Tagging a VLAN helps to determine which VLAN the packet originates from. IEEE 802.1q is also referred to as dot1Q rather frequently. 

The abbreviation “DTP” refers to “dynamic trunking protocol.” DTP gives Cisco switches the ability to dynamically learn the status of its interfaces (access or trunk). 

Simple Network Management Protocol is the abbreviation for SNMP. You can use the SNMP for managing and monitoring the network devices (routers, switches, printers, etc.)

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