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Category: Cisco

End-to-end Focus Is Needed to Achieve Low Latency in Different Types of Wireless Networks

Posted on October 31, 2022 by Marbenz Antonio

Breaking the Latency Barrier - IEEE Spectrum

Numbers for low latency are a dynamic goal. They are higher for low-throughput applications than they are for higher-throughput applications. In general, a proper network design affects latency. Along with end-to-end IP latency and the round-trip delay, radio latency must be taken into account. Wi-Fi, 5G, and Cisco Ultra-Reliable Wireless Backhaul (URWB) technologies all have one main factor that affects latency: the lower the possible latency, the closer applications are placed to where data is being processed in data centers, clouds, or at the network edge.

Applications Have Different Low Latency Requirements

Users are not affected by 150 milliseconds of latency in one direction when using VoIP, so it is acceptable. Sub-50 millisecond bi-directional response times are needed for augmented and virtual reality (AR/VR) and collaboration applications like WebEx or Microsoft Teams. Sub-20 ms response times in a high-throughput network are required for wirelessly operating an autonomous mobile robot (AMR) or an automated guided vehicle (AGV) in a factory, although some closed-loop process control traffic needs 10 ms or less end-to-end latency.

How to Calculate Latency Usually

End-to-end IP latency is typically measured from the wireless device to the IP transport network, wireless network, and application server. Bi-directional latency is calculated using round-trip time (RTT). The closer proximity of applications hosting the wireless devices makes achieving lower RTT latency possible.

The typical round-trip time (RTT) latency between an end user and a cloud provider or content distribution network (CDN) provider should be taken into account when evaluating end-to-end IP latency. The delay time between each network segment or building block from the local device to its application must be estimated in a network design that seeks 150 ms of RTT latency. In the round-trip path, data is transmitted across public and private IP infrastructure, including switches, routers, and firewalls, after a device connects to a local wireless network with its over-the-air latency. Before reaching the application, this frequently results in unpredictable Internet latency. In addition, the processing time necessary before a response is sent back must also be taken into account when evaluating overall latency.

The Handling of Latency by Various Wireless Technologies

Every step of the radio hardware and uplink and downlink transmission processes is optimized in advanced 5G services like 5G Enhanced Mobile Broadband (eMBB) and 5G Ultra-Reliable Low Latency Communications (URLLC). According to whether spectral efficiency in eMBB or low latency in URLLC is the primary goal, new radio capabilities handle low latency communications by providing for a variable transmission time interval (TTI), which can scale from 1ms down to about 140 microseconds. The User Plane Function (UPF) in a 5G network receives IP packets from the radio through a tunnel and serves as the interface between the mobile infrastructure and the data network.

Despite operating in unlicensed bands, Wi-Fi is strictly regulated by countries. To minimize user interference, local rules define the maximum power levels for access points. Range, coverage, penetration, and signal strength are then determined by this. The Wi-Fi protocol’s determinism is expected to be increased in the upcoming generation, enabling better latency control in network architecture.

IP packets in a Wi-Fi network transit similarly from the access point to the wireless radio network, through tunnels to a wireless LAN controller, although Wi-Fi and 5G employ different kinds of encapsulations (WLC). A Wi-Fi WLC for the application server path should be designed as quickly as possible if low latency is needed for an application.

With Cisco Ultra-Reliable Wireless Backhaul (Cisco URWB), a wireless WAN backhaul technology developed from Wi-Fi and created to service mobile network settings, endpoints can move at high speeds with zero-delay handoffs thanks to the low-latency, extremely reliable, long-range connections (like vehicles, trains, or subways). While the end-to-end IP infrastructure starting at the Cisco URWB gateway is similar to Wi-Fi and 5G topologies, operating in unlicensed frequencies, the Cisco URWB segment requires an appropriate design to control latency and fast handover in less than 5 ms.

Recent changes send high-priority packets over redundant channels to maintain connectivity for fast-moving devices. Cisco’s Multipath Operations (MPO) technology, which is patented, can reduce interference and hardware failures by duplicating protected data up to 8 times, avoiding common paths, and working in conjunction with hardware availability for lower latency and improved availability.

Depending on the application, low latency can mean different things and call for different solutions. Depending on the strategy and use cases of your company, the proper network design can lower latency to desired levels.

The round-trip delay and IP end-to-end latency must be taken into consideration while estimating radio latency. The closer applications are to the location where data is being processed, whether in a data center, cloud, or network edge, the lower the likely service latency. While many different factors contribute to reduced latency, using 5G, Wi-Fi, and Cisco URWB.

 


Here at CourseMonster, we know how hard it may be to find the right time and funds for training. We provide effective training programs that enable you to select the training option that best meets the demands of your company.

For more information, please get in touch with one of our course advisers today or contact us at training@coursemonster.com

Posted in CiscoTagged CiscoLeave a Comment on End-to-end Focus Is Needed to Achieve Low Latency in Different Types of Wireless Networks

The Most In-Demand Cisco Certifications

Posted on January 27, 2022July 26, 2022 by Marbenz Antonio

While certification isn’t the goal, it’s a useful tool for IT professionals to get the knowledge they need. Using certification to validate a candidate’s IT skills and knowledge, as well as to match them to specific jobs, has been proven to be a successful strategy.

Cisco is one of the most well-known certification companies in the world when it comes to networking certifications. Among all networking certification programs, Cisco appears to be the most popular. Cisco certificates range in level from beginner to expert, and they cover a wide range of technologies.

Despite being vendor-specific, Cisco certifications are widely accepted due to a large amount of information they get that is vendor-neutral. Many networking providers’ technologies can easily be used to such common information.

The 5 Most In-Demand Cisco Certifications:

Here are the Top 5 Cisco Certifications in Demand Right Now, which can assist Networking Professionals in determining the best path for their career.

1. Cisco Certified Entry Networking Technician (CCENT)

The CCENT certification is a good starting point for those who are new to networking or who have already worked in the field for a while. At the entry level, CCENT accepts network support capabilities and authorizes network administrators with the skills and expertise to create, implement, and maintain small business networks.

100-105 ICND1 is the current CCENT exam. Basic computer operations and operating system knowledge are required for this certification. Network technicians, engineers and administrators, and systems engineers are among the roles for which a CCENT certificate tenant is certified. CCENT is also a great way to get into some of the more advanced Cisco certifications.

2. Cisco Certified Network Associate Routing and Switching (CCNA R&S)

CCNA R&S is still the most popular certification for newcomers to networking. Network administrators of all ages started their careers with CCNA R&S, but Cisco has expanded the CCNA options and included other tracks such as wireless, security, data center, and cloud.

The concepts of routing and switching, as well as the technology of network infrastructure parts, are all covered in CCNA R&S. It includes a non-biased explanation of networking technology as well as the operating systems for Cisco routers and switches.

Candidates can either keep their CCENT certification and take the ICND2 test or take the CCNA composite exam to get CCNA R&S. Cisco-provided courses, online practice tests, and sample questions can help you prepare for the CCNA R&S exam.

3. Cisco Certified Design Associate (CCDA)

The CCNA and CCDA certificates focus on network infrastructure operation, whereas the CCNA and CCDA certifications focus on network design and scalability. This certification is highly recommended for IT professionals who are passionate about putting the pieces together for a network design that meets an organization’s needs for a scalable and reliable network. Network design engineers are highly valued by businesses because of their ability to create new networks as well as upgrade existing ones.

Passing Cisco’s DESGN exam, which encompasses designing business network infrastructures including routing and switching technologies, protocols, and tools, is required to obtain a CCDA certification. The CCDP certification, which focuses on more advanced routing and switching technologies as well as a variety of network architectures, is also available with a CCDA.

A valid CCENT, a valid CCNA Routing, and Switching, or any CCIE certification is required for CCDA certification, which is why Cisco requires a valid CCENT, a valid CCNA Routing, and Switching, or any CCIE certification for CCDA certification.

4. Cisco Certified Network Associate Cloud (CCNA Cloud)

For networking newbies joining a fast expanding employment market, the CCNA Cloud certification is a very solid credential. With the IT industry’s rapid move to the cloud, network engineers with extensive expertise and knowledge of cloud operations are becoming increasingly concerned.

CCNA Cloud introduces network engineers to cloud infrastructure and teaches them how to use it to solve problems. The need for CCNA’s will continue to rise as cloud utilization continues to rise.

Even though there are no criteria for this certification, Cisco strongly recommends that applicants have a basic understanding of network protocols and technologies. Two tests, the CLDFND and CLDADM, must be passed to be certified. Cloud Basics, as well as Cisco cloud products, are covered extensively in both courses.

For Cisco accredited specialists, the era of cloud computing is forcing a lot of chances. Earning a Cisco networking certification has never had a set deadline. It will give you a new perspective on your profession and life.

5. Cisco Certified Network Associate Data Center (CCNA Data Center)

The CCNA is a relatively new certification that grew out of the original CCNA into more separate levels. CCNA Data Center focuses on the network equipment inside a data center, rather than WAN and Internet access.

DCICN and DCICT certifications need two tests. The courses include data center networking concepts as well as data center technologies such as network and server virtualization, as well as storage. This certification track specialization was established to match task specialization and focus on certain groups of network infrastructure technologies and activities.

Datacenter network administrators are in high demand due to the current high interest in individual data centers. It’s the best place to go if you’re a networking immigrant trying to expand your skill set and boost your chances of obtaining a fantastic starting job.

 


Here at CourseMonster, we know how hard it may be to find the right time and funds for training. We provide effective training programs that enable you to select the training option that best meets the demands of your company.

For more information, please get in touch with one of our course advisers today or contact us at training@coursemonster.com

Posted in CiscoTagged CiscoLeave a Comment on The Most In-Demand Cisco Certifications

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