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Exam Code: 920-261 Practice test 2022 by Killexams.com team
Nortel Application Switch Rls.24.x Configuration & Admin
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Killexams : Nortel Configuration approach - BingNews https://killexams.com/pass4sure/exam-detail/920-261 Search results Killexams : Nortel Configuration approach - BingNews https://killexams.com/pass4sure/exam-detail/920-261 https://killexams.com/exam_list/Nortel Killexams : Securing Smart Cities from the Ground Up

Smart City network infrastructure demands a proactive approach to find vulnerabilities before hackers find them

Smart technology continues to change how people live and interact with the cities around them. While the full value of a connected city evolves – one that leverages innovations powered by artificial intelligence and machine learning – cybersecurity stands as one of its greatest challenges. 

The Smart City Conundrum

While the promise of Smart Cities provides municipalities and inhabitants with the efficiency and value of “smart” services, it also creates a cybersecurity challenge. Each connected component – from devices to the network infrastructure – offers a potential entry point for hackers to steal data, damage systems, and gain access to information they shouldn’t have. 

Smart City ecosystems could be filled with tens of thousands of Internet of Things (IoT) devices communicating over public network infrastructure. In order for the Smart City to succeed, each IoT device must be low power, exhibit excellent performance, be able to withstand interference, and be reliable. They’ll operate with the free flow of data between devices and the network infrastructure that connects them. How do Smart Cities ensure that each part of the Smart City ecosystem – the devices and network infrastructure -- remains secure?

Smart City device security begins at the component level 

Smart City device manufacturers -- from smart lighting and water systems to smart traffic management systems and transportation systems -- serve as the first line of defense when it comes to security. Each device may feature many technologies working together such as chipsets, sensors, communications protocols, firmware and software. These technology components must be built or sourced with security in mind. 

Security testing of components and devices should not be an afterthought, but a proactive part of the design and manufacturing process. Best practices may include:

• Communication protocol testing - For example, Bluetooth vulnerabilities like Sweyntooth and Braktooth in communication chipsets, could open the door to hackers. Braktooth vulnerabilities recently impacted billions of devices from the system-on-a-chip (SOC) in more than a thousand chipsets used in laptops, smartphones, IoT and industrial devices. Protocol level vulnerabilities like these are difficult to detect. While the security community established best practices for discovering application-level vulnerabilities, protocol-level vulnerabilities are much harder to pinpoint. The only way to test for these kind of vulnerabilities is using protocol fuzzing which detects vulnerabilities during the communications handshake or hand-off process. 

• Cybersecurity firmware, software and password update capabilities - Cybersecurity threats and vulnerabilities change over time. Many headline-making IoT security incidents have been caused by poor passwords and out-of-date firmware. Device manufacturers can take simple steps to enable Smart City device owners to strengthen authentication and provide methods to update firmware and software as the cybersecurity landscape evolves over the lifetime of their devices. 

Unfortunately, once a device is purchased, there is little a Smart City can do to Excellerate its security, so making the right purchase is the key to success. The purchasing process should consider cybersecurity in the “bill of materials” (BOM) that requires that the device manufacturer considered component and device cybersecurity and can validate that their devices passed appropriate cybersecurity testing. Smart City owners should keep in mind that over time, smart device manufacturers may continue to develop new devices with short product cycles. This means that owners will need to understand that manufacturers will may accelerate dropping support for older devices.

Taking the risk out of the Smart City network

The second line of defense in a Smart City is network infrastructure. In a Smart City, the back-end network is the nerve center that keeps everything running smoothly. That’s why it’s important for Smart Cities to rigorously test their back-end network’s security posture including policies and configurations on a continuous basis.

There is additional network infrastructure to consider. Smart Cities now connect operational technology (OT) systems such as water and energy utilities to Smart City network infrastructure. These OT connections increase the risk to the network since they are prime targets for bad actors. OT systems traditionally existed as stand-alone city infrastructure separated from the connected network. Now, newly connected to the shared network infrastructure, OT systems must be secured like traditional IT systems. 

Smart City owners should follow cybersecurity best practices to Excellerate their overall network security posture. Smart City network infrastructure demands a proactive approach to find vulnerabilities before hackers find them.  A proactive approach includes utilizing breach and attack simulation tools to continuously probe for potential vulnerabilities. Adopting these tools can:

• Prevent attackers from moving laterally across the network

• Avoid “configuration drift” where system updates and tool patches cause unintended misconfiguration and leave the door open to attackers

• Reduce dwell time by training your security information and event management system to recognize indicators-of-compromise for emergency or common attacks.

Smart Cities promise to deliver value from big data and analytics. However, for every new connection, there’s an attacker looking to exploit it. For Smart Cities to truly live up to their promise, we shouldn’t forget that – like all infrastructure – safety and security are a top priority.

Learn About Securing Smart Cities at SecurityWeek's ICS Cybersecurity Conference

Marie Hattar is chief marketing officer (CMO) at Keysight Technologies. She has more than 20 years of marketing leadership experience spanning the security, routing, switching, telecom and mobility markets. Before becoming Keysight’s CMO, Marie was CMO at Ixia and at Check Point Software Technologies. Prior to that, she was Vice President at Cisco where she led the company’s enterprise networking and security portfolio and helped drive the company’s leadership in networking. Marie also worked at Nortel Networks, Alteon WebSystems, and Shasta Networks in senior marketing and CTO positions. Marie received a master’s degree in Business Administration in Marketing from York University and a Bachelor’s degree in Electrical Engineering from the University of Toronto.
Previous Columns by Marie Hattar:
Thu, 28 Jul 2022 02:28:00 -0500 en text/html https://www.securityweek.com/securing-smart-cities-ground
Killexams : The Advantages of the Multiview Framework Model

Andrew Latham has worked as a professional copywriter since 2005 and is the owner of LanguageVox, a Spanish and English language services provider. His work has been published in "Property News" and on the San Francisco Chronicle's website, SFGate. Latham holds a Bachelor of Science in English and a diploma in linguistics from Open University.

Sun, 16 Aug 2020 12:37:00 -0500 en-US text/html https://smallbusiness.chron.com/advantages-multiview-framework-model-10389.html
Killexams : QuickLogic puts hard cores into its FPGAs

QuickLogic puts hard cores into its FPGAs
By Anthony Cataldo, EE Times
October 28, 2002 (3:15 p.m. EST)
URL: http://www.eetimes.com/story/OEG20021028S0042

SUNNYVALE, Calif. — The next big fight in the programmable-logic world will involve on-chip intellectual property cores for an FPGA and the interconnect needed to make them work, according to Tom Hart, president and chief executive officer of QuickLogic Corp. To that end, QuickLogic today (Oct. 28) disclosed an FPGA that combines 200,000 gates of programmable logic and a hard-wired 32-bit PCI controller in a 280-pin package.

QuickLogic has been down this integration path before. It has fielded FPGAs that include a pre-verified MIPS processor core and two Ethernet MACs on one chip. Assuming that few engineering teams can afford to design cores that have been standardized and are widely available, the company has placed them on-chip.

"If you were an engineering manager, why would you want to design and verify a 10/100 MAC?," Hart asked in a recent presentation at the company's headquarters here.

Melding an FPGA and hard ASI C gates can reduce power consumption and raise performance, QuickLogic said. A standalone 32-bit MIPS processor running full speed has a throughput of 16-Mbits/second; putting the same processor on an FPGA die yields 300 Mbits/s of throughput while using only 10 percent of the CPU's horsepower, Hart said.

"This is how you get to higher performance without jacking up the power," he said.

QuickLogic said better performance is a key attribute of its new QL5632 device, which is available now in a PBGA or PQTP package for $21 each in 25,000-unit quantities.

The addition of a PCI core to an FPGA is not in itself groundbreaking. FPGA makers Altera Corp. and Xilinx Inc. have been porting soft PCI controllers into their devices for years. But programming soft intellectual property cores into SRAM-based FPGAs can take months of design and debug work, QuickLogic said. Worst, this approach poses "a very serious risk" that standard PCI plug-in cards will be rendered inoperable because of the del ay imposed while an SRAM-based FPGA is being loaded by an external PROM device. In contrast, QuickLogic said its FPGAs are programmed through a layer of amorphous silicon, so the configuration data is etched permanently into the FPGA whether the power is on or off.

The downside to this approach is that QuickLogic's FPGAs can only be programmed once, whereas SRAM-based FPGAs can be reconfigured in the field or in the lab, over and over again.

Red herring

Hart said reprogrammability is a marketing "red herring" and that most customers don't need it. With customers such as Emulex, Nortel and Teradyne, Hart said QuickLogic has proven as much.

"Xilinx has convinced the world that a lemon called volatility is lemonade called reprogrammability," Hart said.

Routing is another area where QuickLogic's architecture shines, Hart said. An amorphous silicon layer is built up vertically between metals and acts as a transistor-less switch, so there are fewer limits to the amount of routing that can be done compared to mainstream FPGAs, which need a six-transistor SRAM cell for every switch. That's why QuickLogic can bolt a MIPS processor and two 10/100 Ethernet controller MACs to its FPGA, while Altera has only been able to integrate an ARM processor, Hart said.

QuickLogic's approach also confers four times more density than SRAM-based FPGAs, making it more silicon efficient. "They're building a strip mall and we're building a high-rise," Hart said at a recent investors conference. On paper this gives QuickLogic a big cost advantage over its larger rivals, but Hart said he's not willing to engage in a price war with Altera and Xilinx, which got an earlier start in the market.

This partly explains QuickLogic's dogged pursuit of on-chip embedded cores over conventional blank-slate FPGAs. Pushing aside his plate of meatloaf and mashed potatoes, Hart unfolded a napkin and scribbled two balance sheets showing the rough cost of revenue incurred by his company again st one of his big rivals. His conclusion: his competitor could handily match his price cuts with minimal pain. "We'd be dead," he said.

Mon, 18 Jul 2022 12:00:00 -0500 en text/html https://www.design-reuse.com/news/4191/quicklogic-puts-hard-cores-into-fpgas.html
Killexams : SaaS DR/BC: If You Think Cloud Data is Forever, Think Again

Key Takeaways

  • SaaS is quickly becoming the default tool for how we build and scale businesses. It’s cheaper and faster than ever before. However, this reliance on SaaS comes with one glaring risk that’s rarely discussed.
  • The “Shared Responsibility Model” doesn’t just govern your relationship with AWS, it actually impacts all of cloud computing. Even for SaaS, users are on the hook for protecting their own data.
  • Human error, cyber threats and integrations that have gone wrong are the main causes of data loss in SaaS. And it’s not uncommon, in one study, about 40% of users have said they have lost data in SaaS applications.
  • It’s possible to create your own in-house solution to help automate some of the manual work around backing-up SaaS data. However, there are limitations to this approach and none of them will help you restore data back to its original state.
  • A data continuity strategy is essential in SaaS, otherwise you may be scambling to restore all information you rely on each and every day. 
     

The Cloud is Not Forever and Neither is Your Data 

When I began my career in technical operations (mostly what we call DevOps today) the world was dramatically different. This was before the dawn of the new millennium. When the world’s biggest and most well-known SaaS company, Salesforce, was operating out of an apartment in San Francisco. 

Back then, on-premise ruled the roost. Rows of towers filled countless rooms. These systems were expensive to set up and maintain, from both a labour and parts perspective. Building a business using only SaaS applications was technically possible back then but logistically a nightmare. On-prem would continue to be the default way for running software for years to come. 

But technology always progresses at lightspeed. So just three years after Salesforce began preaching the “end of software”, Amazon Web Services came online and changed the game completely.

Today a new SaaS tool can be built and deployed across the world in mere days. Businesses are now embracing SaaS solutions at a record pace. The average small to medium-sized business can easily have over 100 SaaS applications in their technology stack. Twenty years ago, having this many applications to run a business was unthinkable and would have cost millions of dollars in operational resources. However, at Rewind, where I oversee technical operations, I looked after our software needs with a modem and a laptop. 

SaaS has created a completely different reality for modern businesses. We can build and grow businesses cheaper and faster than ever before. Like most “too good to be true” things, there’s a catch. All this convenience comes with one inherent risk. It’s a risk that people rarely discussed in my early days as a DevOps and is still rarely talked about. Yet this risk is important to understand, otherwise, all the vital SaaS data you rely on each and every day could disappear in the blink of an eye.

And it could be gone for good. 

The Shared Responsibility of SaaS

This likely goes without saying but you rent SaaS applications, you don’t own them. Those giant on-prem server rooms companies housed years ago, now rest with the SaaS provider. You simply access their servers (and your data) through an operating system or API. Now you are probably thinking, “Dave, I know all this. So what?” 

Well, this is where the conundrum lies. 

If you look at the terms of service for SaaS companies, they do their best to ensure their applications are up and running at all times. It doesn’t matter if servers are compromised by fire, meteor strike, or just human error, SaaS companies strive to ensure that every time a user logs in, the software is available. The bad news is this is where their responsibility ends. 

You, the user, are on the hook for backing up and restoring whatever data you’ve entered and stored in their services. Hence the term “Shared Responsibility Model”. This term is most associated with AWS but this model actually governs all of cloud computing.

The above chart breaks down the various scenarios for protecting elements of the cloud computing relationship. You can see that with the SaaS model, the largest onus is on the software provider. Yet there are still things a user is responsible for; User Access and Data.  

I’ve talked to other folks in DevOps, site reliability, or IT roles in recent years and I can tell you that the level of skepticism is high. They often don’t believe their data isn’t backed up by the SaaS provider in real time. I empathize with them, though, because I was once in their shoes. So when I meet this resistance, I  just point people to the various terms of service laid out by each SaaS provider. Here is GitHub’s, here is Shopify’s and the one for Office 365. It’s all there in black and white.

The reason the Shared Responsibility Model exists in the first place essentially comes down to the architecture of each application. A SaaS provider has built its software to maximize the use of its operating system, not continually snapshot and store the millions or billions of data points created by users. Now, this is not a “one-size fits all scenario”. Some SaaS providers may be able to restore lost data. However, if they do, in my experience, it’s often an old snapshot, it’s incomplete, and the process to get everything back can take days, if not weeks. 

Again, it’s simply because SaaS providers are lumping all user data together, in a way that makes sense for the provider. Trying to find it again, once it’s deleted or compromised, is like looking for a needle in a haystack, within a field of haystacks.    

How Data Loss Happens in SaaS

The likelihood of losing data from a SaaS tool is the next question that inevitably comes up. One study conducted by Oracle and KPMG found that 49% of SaaS users have previously lost data. Our own research found that 40% of users have previously lost data. There are really three ways that this happens; risks that you may already be very aware of. They are human error, cyberthreats, and 3rd party app integrations. 

Humans and technology have always had co-dependent challenges. Let’s face it, it’s one of the main reasons my career exists! So it stands to reason that human inference, whether deliberate or not, is a common reason for losing information. This can be as innocuous as uploading a CSV file that corrupts data sets, accidentally deleting product listings, or overwriting code repositories with a forced push.

There’s also intentional human interference. This means someone who has authorized access, nuking a bunch of stuff. It may sound far-fetched but we have seen terminated employees or third-party contractors cause major issues. It’s not very common, but it happens.       

Cyberthreats are next on the list, which are all issues that most technical operations teams are used to. Most of my peers are aware that the level of attacks increased during the global pandemic, but the rate of attacks had already been increasing prior to COVID-19. Ransomware, phishing, DDoS, and more are all being used to target and disrupt business operations. If this happens, data can be compromised or completely wiped out. 

Finally, 3rd party app integrations can be a source of frustration when it comes to data loss. Go back and read the terms of service for apps connected to your favourite SaaS tool. They may save a ton of time but they may have a lot of control over all the data you create and store in these tools. We’ve seen apps override and permanently delete reams of data. By the time teams catch it, the damage is already done.

There are some other ways data can be lost but these are the most common. The good news is that you can take steps to mitigate downtime. I’ll outline a common one, which is writing your own backup script for a Git.

One approach to writing a GitHub backup script

There are a lot of ways to approach this. Simply Google “git backup script” and lots of options pop up. All of them have their quirks and limitations. Here is a quick rundown of some of them.

Creating a local backup in Cron Scripts

Essentially you are writing a script to clone a repo, at various intervals, using cron jobs. (Note the cron job tool you used will depend on the OS you use). This method essentially takes snapshots over time. To restore a lost repo, you just pick the snapshot you want to bring back.  For a complete copy use git clone --mirror to mirror your repositories. This ensures all remote and local branches, tags, and refs get included. 

The pros of using this method are a lack of reliance on external tools for backups and the only cost is your time. 

The cons are a few. You actually won’t have a full backup. This clone won’t have hooks, reflogs, configuration, description files, and other metadata. It’s also a lot of manual work and becomes more complex if trying to add error monitoring, logging, and error notification. And finally, as the snapshots pile up, you’ll need to consider accounts for cleanups and archiving.

Using Syncthing

Syncthing is a GUI/CLI application that allows for file syncing across many devices. All the devices need to have Syncthing installed on them and be configured to connect with one another. Keep in mind that syncing and backing up are different, as you are not creating a copy, but rather ensuring a file is identical across multiple devices.  

The pros are that it is free and one of the more intuitive methods for a DIY “backup” since it provides a GUI.  Cons: Syncthing only works between individual devices, so you can’t directly back up your repository from a code hosting provider. Manual fixes are needed when errors occur. Also, syncing a git repo could lead to corruption and conflicts of a repository, especially if people work on different branches. Syncthing also sucks up a lot of resources with its continuous scanning, hashing, and encryption. Lastly, it only maintains one version, not multiple snapshots. 

Using SCM Backup

SCM Backup creates an offline clone of a GitHub or BitBucket repository. It makes a significant difference if you are trying to back up many repos at once. After the initial configuration, it grabs a list of all the repositories through an API. You can also exclude certain repos if need be. 

SCM lets you specify backup folder location, authentication credentials, email settings, and more. 

Here’s the drawback though, the copied repositories do not contain hooks, reflogs, or configuration files, or metadata such as issues, pull requests, or releases.  And configuration settings can change across different code hosting providers. Finally, in order to run it, you need to have .NET Core installed on your machine.

Now that’s just three ways to backup a git repository. As I mentioned before, just type a few words into Google and a litany of options comes up. But before you get the dev team to build a homegrown solution, keep these two things in mind.

First, any DIY solution will still require a significant amount of manual work because they only clone and/or backup; they can’t restore data. In fact, that’s actually the case with most SaaS tools, not just in-house backup solutions. So although you may have some snapshots or cloned files, it will likely be in a format that needs to be reuploaded into a SaaS tool. One way around this is to build a backup as a service program, but that will likely eat up a ton of developer time. 

That brings us to the second thing to keep in mind, the constantly changing states of APIs. Let’s say you build a rigorous in-house tool: you’ll need a team to be constantly checking for API updates, and then making the necessary changes to this in-house tool so it’s always working. I can only speak for myself, but I’m constantly trying to help dev teams avoid repetitive menial tasks. So although creating a DIY backup script can work, you need to decide where you want development teams to spend their time.

Data Continuity Strategies for SaaS

So what’s the way forward in all of this? There are a few things to consider. And these steps won’t be uncommon to most technical operations teams. First, figure out whether you want to DIY or outsource your backup needs. We already covered the in-house options and the challenges it presents. So if you decide to look for a backup and recovery service, just remember to do your homework. There are a lot of choices, so as you go through due diligence, look at reviews, talk to peers, read technical documentation and honestly, figure out if company X seems trustworthy. They will have access to your data after all.  

Next, audit all your third-party applications. I won’t sugarcoat it, this can be a lot of work. But remember the “terms of service” agreements? There are always a few surprises to be found. And you may not like what you see. I recommend you do this about once a year and make a pro/cons list. Is the value you get from this app worth the trade-off of access the app has? If it’s not, you may want to look for another tool. Fun fact: Compliance standards like SOC2 require a “vendor assessment” for a reason. External vendors or apps are a common culprit when it comes to accidental data loss.

And finally, limit who has access to each and every SaaS application. Most people acknowledge the benefits of using the least privileged approach, but it isn’t always put into practice. So make sure the right people have the right access, ensure all users have unique login credentials (use a password manager to manage the multiple login hellscape) and get MFA installed.

It’s not a laundry list of things nor is it incredibly complex. I truly believe that SaaS is the best way to build and run organizations. But I hope now it’s glaringly obvious to any DevOps, SRE or IT professional that you need to safeguard all the information that you are entrusting to these tools. There is an old saying I learned in those early days of my career, “There are two types of people in this world – those who have lost data and those who are about to lose data”. 

You don’t want to be the person who has to inform your CIO that you are now one of those people. Of course, if that happens, feel free to send them my way. I’m certain I’ll be explaining the Shared Responsibility Model of SaaS until my career is over!  

About the Author

Dave North has been a versatile member of the Ottawa technology sector for more than 25 years. Dave is currently working at Rewind leading 3 teams (devops, trust, IT) as the director of technical operations. Prior to Rewind, Dave was a long time member of Signiant, holding many roles in the organization including sales engineer, pro services, technical support manager, product owner and devops director. A proven leader and innovator, Dave holds 5 US patents and helped drive Signiant’s move to a cloud SAAS business model with the award winning Media Shuttle product. Prior to Signiant, Dave held several roles at Nortel, Bay Networks and ISOTRO Network Management working on the NetID product suite. Dave is fanatical about cloud computing, automation, gadgets and Formula 1 racing.

Thu, 09 Dec 2021 14:12:00 -0600 en text/html https://www.infoq.com/articles/saas-drbc-data-backup/
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