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Find out which OSI layer is concerned with reliable end-to-end delivery of data - and more. Get answers to your OSI reference model and network layer questions here.
Global Knowledge Course Director and Lab Topology Architect Joey DeWiele, a specialist in Unified Communications, explains QoS.
Diane Teare, Global Knowledge's Cisco Course Director, discusses the advantages to taking our CCNA Boot Camp.
Global Knowledge instructor Kevin Schweers reviews the basic differences between the two paths to achieving CCNA certification.
In the spring of 2013, Cisco announced major updates to their Cisco Certified Network Associate (CCNA) curricula, including a new version of the CCNA Routing and Switching exam (200-120 CCNA). This paper provides a review of the CCNA Routing and Switching exam's critical concepts, as an aid to students preparing to pass the latest version of the CCNA Routing and Switching exam.
While the Internet uses IP addresses assigned by an Internet authority such as the American Registry for Internet Numbers (ARIN), there are too few of these numbers to uniquely identify the millions of computers and computing devices in the world. Therefore, most enterprises use private addresses which allow them to identify the aforementioned computers. Of course, these IP numbers cannot be allowed on the Internet because all private networks use the same ones so there would be vast overlapping of addresses, and the addresses are not compliant anyway. Therefore, it is necessary to change the identity of a private host to a legal public host. This process is called Network Address Translation (NAT) and may be implemented on Cisco firewall products and Cisco routers. The firewall device(s) at the Internet demarcation point is by far the more popular way to implement NAT, but routers are used in small offices or small-to-medium-sized networks in which a separate firewalling solution is not possible or affordable. The focus of this paper is on the router-based NAT solution.
The process of learning how to subnet IP addresses begins with understanding binary numbers and decimal conversions along with the basic structure of IPv4 addresses. This paper focuses on the mathematics of binary numbering and IP address structure.
What is policy-based routing? PBR is the process of using a route map to match on something more than the destination and then defining the path out of the router based on those conditions. Learn more here!
The first big push toward implementation of IPv6 was mobile devices. Now, one of the driving forces is the Internet of Things. As the name implies, this means everything, including machine to machine communication (M2M).
Switches play a vital role in moving data from one device to another. Specifically, switches greatly improve network performance, compared to hubs, by providing dedicated bandwidth to each end device, supporting full-duplex connectivity, utilizing the MAC address table to make forwarding decisions, and utilizing ASICs and CAM tables to increase the rate at which frames can be processed.
When properly utilized, VLANs and trunks provide flexibility, stability and ease of troubleshooting. This paper provides technical details about VLANs and trunks, along with design options at a basic to intermediate level. Recommendations and commands are included throughout.
What path you decide to take to earn your Cisco Certified Network Associate (CCNA) Routing and Switching certification will depend on a number of factors including your availability, willingness to work long hours and your ability to absorb a lot of information in a short period of time. This white paper includes self-assessments and training recommendations to help you figure out if taking the CCNAX Routing and Switching Boot Camp or taking two separate ICND1 and ICND2 courses is the best fit for you.
Agile project management literally turns the world of managing projects upside down. The triple constraint is balanced in an unconventional way, the role of the matrix team coordinator is downplayed, and risk management can be built into the prioritization approach. So, what is left for the PM to do?
This webinar focuses on assisting leaders who are determining whether Agile is right for their organization. In one hour, we will take you from the basic concepts of Agile methodology to understanding the process and what your role is as a leader. You will learn the challenges and benefits and how an Agile culture can fuel your teams and provide value for your customers faster.
Whether your project follows formal or informal project management, waterfall, or an iterative or Agile, making use of the daily stand-up meeting is an essential habit required for every self-organizing team. Stand-ups are a core practice and help us determine customer value, reinforce team structure, organize priorities, address uncertainty, remove impediments, and manage our time through the use of a personal Kanban. In this one-hour webinar, we will: Determine daily customer value with the three stand-up questions, Investigate the use a Team Charter to build team structure and balance, Address daily uncertainty with a Risk Burndown, and Participate in a small exercise and create your own personal weekly and daily Kanban using exclusive cognitive techniques to manage the multitasking behaviors required of all of us.
The process of subnetting is both a mathematical process and a network design process. Mathematics drives how subnets are calculated, identified, and assigned. The network design and requirements of the organization drive how many subnets are needed and how many hosts an individual subnet needs to support. Binary basics and IPv4 address structure were covered in part one of this two-part paper.
Building upon the IT best practices of Lean, Agile Scrum and IT Service Management, DevOps adds that “missing” layer to tie together the service lifecycle workflow across Development and Operations, while leveraging the latest in automation technology. Demand for skilled, open-minded, and collaborative professionals with DevOps knowledge is rapidly increasing. Are you ready for change?
Routers and switches make up the bulk of network infrastructure and are vulnerable to attack. We hear about mass Denial of Service (DOS) attacks or Distributed Denial of Service (DDOS), but the network itself is as big a risk because if it is taken out, there is no path for the data to flow.
The traditional network engineering model of configuring one device at a time simply doesn’t scale to the growing needs of today’s network. Cisco's intent-based networks and software-defined networking solutions will enable your organization to meet the demands of network programmability and automation. The result will be greater network agility to support new applications while complying with increasing security needs.
If you’re interested in pursuing a career in Cisco technologies or acquiring a Cisco career certification, all paths begin with ICND1 v3.0 - Interconnecting Cisco Networking Devices, Part 1.
Software-defined networking (SDN) is a solution that will enable your organization to meet the demands of network programmability and automation. The result will be greater network agility to support new applications while complying with increasing security needs.
The CCNAX - CCNA Routing and Switching Boot Camp is a great option to obtain Cisco Routing and Switching skills while pursuing the CCNA Routing and Switching certification.
In support of software-defined networking, Cisco has introduced several products to strengthen networks and meet the increased demand for flexible and cost-efficient solutions. The Cisco SDN solution in the data center is ACI. Outside the data center the primary Cisco solution is DNA.
This recorded webinar will help you understand the basics of switch functionality in Cisco networks. In this setting, a SWITCH is functioning at OSI Layer 2. Before SWITCHES we used BRIDGES to segment within the same network.