There are two considerations for planning a network: The number of hosts required for each network. The number of sub-network needed. The table below in the figure displays the details for subnetting a /24 network. Observe how there is an opposite relationship between the number of hosts and the number of subnets. The more bits […]
Some organizations may need even more subnets. For example, a small ISP that requires 2000 subnets for its clients. Each client will need an abundance of space in the host portion to create their own subnets. The network address 10.0.0.0 has a default subnet mask of 255.0.0.0 or /8 prefix. This means there are 24 […]
In circumstances where required a large number of subnets, an IP network is required that has more hosts bits to borrow from. For example, the class B network address 172.16.0.0 has a default mask of 255.255.0.0, or /16. So, this address has 16 network bits in the network portion and 16 host bits in the host […]
To understand subnetting at a classless level see the following classless subnetting examples. The private network address 192.168.10.0/24, In figure 1; the first three octets are displayed in decimal, while the last octet is displayed in binary. This is because we will be borrowing bits from this octet to create more sub-network. The subnet mask […]
Each interface on a router which is connected to a network is required IP address and subnet mask. The IP address and subnet mask are used to identify the specific broadcast domain. Remember that we have already learned the following topics in the previous chapter: Introduction to IP address IPv4 Addresses IPv4 Host and […]
Broadcast domains are a logical parts or divisions of a computer network in which a broadcast is forwarded. In a broadcast domain, all the devices can be reached via broadcast at the datalink layer (OSI Layer 2). A Broadcast Domain consists of all the devices that will receive any broadcast packet; originating from any device within the […]
Subnetting is used to design, implement and manage an effective IP addressing plan. It is used to partition a single physical network into more than one smaller logical sub-networks (subnets). An IPv4 address contains a network portion and a host portion. These two portions of addressing allow for basic network groupings that facilitate in routing […]
The Cisco Certified Network Associate – Routing and Switching (CCNA – Routing and Switching ) certification title has become the leading entry level network certification. The Cisco Certified Network Associate (Routing and Switching) certification was developed by Cisco to test the knowledge of candidate at networking at entry level. The CCNA – Routing and Switching certification analyzes the candidate’s ability to install, configure, operate, and troubleshoot medium-size networks.
The exam is scheduled for 120 minutes and has 50-60 questions on it. The people whose language is not English can get additional 30 mints.
During the exam, no outside reference materials are allowed for candidates. The following topics are general guidelines for the content. In order to improve reflect the contents of the exam and for clarity purposes, the below guidelines may change at any time without notice.
- Operation of IP Data Networks
- LAN Switching Technologies
- IP addressing (IPv4/IPv6)
- IP Routing Technologies
- IP Services
- Network Device Security
- WAN Technologies
CCNA Routing and Switching certification have many advantages to the employee and employer. These include future-proofing and greater utilization of network capabilities resulting in increased employee productivity and an improved ROI on network investments. The employees get training on the newest hardware and software. So when the employers get a chance to upgrade their hardware and software, their employees will have the tools and skills to hit the ground running when new projects begin.
The CCNA Routing and Switching certification is valid for three years at such time, you will need to recertify.