Preparing for the Juniper Networks Certified Design Associate (JNCDA) Exam

Recently I set my sights on Juniper Networks‘ Design track as I am working with customers on an almost daily basis with regards to Data Center design. As such the Juniper Network Design – Data Center curriculum and associated JNCDS-DC certification looked very appealing. To top that off, according to Certification Magazine, the JNCDA and the JNCDS-DC certifications …

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High Availability for Red Hat Virtualization Manager 4.1

Hi folks, if you missed Red Hat Summit 2017 last week, it was great time in Boston. As promised, I’m uploading my presentation on HA for RHV-M 4.1 – hosted engine. Although, I’m doing it a little differently this time. I took the time this week to actually re-record it including the demos! This way you get a flavor of how I actually presented it last week.It turned out a little shorter in the re-recording, as it only clocked out at about 30 minutes and my session was about 10 minutes longer. But it’s all good. I walk through what hosted engine is, how it compares to standard deployment, why you would care if RHV-M goes down, and how to actually deploy hosted engine.

The embedded demos walk through the deployment of RHVH, the deployment of hosted engine via Cockpit, then a forced failover courtesy of a guest Velociraptor. Ok, not really, I just yanked the power on the underlying host.. but watch the demo anyway..

(best viewed in full screen, give it a moment to get in focus..)

One of the things that I really tried to emphasize in both the original presentation and the re-recording Continue reading

Some HP PCs are recording your keystrokes

Nearly thirty different Hewlett-Packard Windows PC models may be recording every keystroke their owners make and storing them in a human-readable file accessible to any user on the PC. Oh, boy.Switzerland-based security company Modzero recently discovered a keylogger present in an audio program in HP PCs called MicTray. Modzero reported it on their blog early Thursday morning.You can also find a complete list of affected HP PC models in the company's security advisory. Affected models include PCs from the HP Elitebook 800 series, HP ProBook 600 and 400 series', the EliteBook Folio G1, and others. The program has existed on HP PCs since at least late 2015, Modzero says.To read this article in full or to leave a comment, please click here

Some HP PCs are recording your keystrokes

Nearly thirty different Hewlett-Packard Windows PC models may be recording every keystroke their owners make and storing them in a human-readable file accessible to any user on the PC. Oh, boy.Switzerland-based security company Modzero recently discovered a keylogger present in an audio program in HP PCs called MicTray. Modzero reported it on their blog early Thursday morning.You can also find a complete list of affected HP PC models in the company's security advisory. Affected models include PCs from the HP Elitebook 800 series, HP ProBook 600 and 400 series', the EliteBook Folio G1, and others. The program has existed on HP PCs since at least late 2015, Modzero says.To read this article in full or to leave a comment, please click here

Puppet zeroes in on containers, cloud workloads

Devops platform provider Puppet has introduced its Puppet Cloud Discovery service for learning what, exactly, users have running in the cloud and their impact.As Puppet's first foray into SaaS, the service offers visibility into cloud workloads, providing the same type of introspection as the on-premise Puppet Enterprise platform. For example, it can tell users if they might have vulnerabilities because they're running an outdated version of OpenSSL, or it could inform users which virtual machines need to migrated when moving from Windows Server 2012 to 2016.[ Download the Deep Dive: Monitoring in the age of devops. | Get a digest of the day's top tech stories in the InfoWorld Daily newsletter. ] Cloud Discovery will debut in a preview form on the Amazon Web Services cloud later this month; plans call for it to eventually be supported on other cloud platforms as well.To read this article in full or to leave a comment, please click here

Why digital disruption leaves no room for bimodal IT

Saying bimodal IT is dead may be a tad premature. But as digital disruption continues to sweep across sectors -- driven by companies such as Amazon.com, Uber and Airbnb -- two-speed IT is beginning to look and feel antiquated. Some CIOs and consultants argue that the operating model hinders innovation at a time when companies must accelerate their digital initiatives.Introduced by Gartner in 2014, bimodal IT splits technology departments into two groups: a stable mode (Mode 1) where the bulk of technology is carefully cultivated and refined and a second mode (Mode 2) that espouses experimentation, free-thinking and agility. Forking IT into separate tracks made sense a few years ago, as many CIOs worked to plug gaps in talent, process and technology, Forrester Research analyst Matthew Guarini tells CIO.com.To read this article in full or to leave a comment, please click here

Latest firmware updates for Asus routers fix CSRF security flaws

Users of Asus RT-N and RT-AC series routers should install the latest firmware updates released for their models because they address vulnerabilities that could allow attackers to hijack router settings.The flaws were discovered by researchers from security consultancy outfit Nightwatch Cybersecurity and leave many Asus router models exposed to cross-site request forgery (CSRF) attacks.CSRF is an attack technique that involves hijacking a user's browser when visiting a specially crafted website and forcing it to send unauthorized requests to a different website -- or in this case, the router web-based administration interface accessible over the local area network (LAN).To read this article in full or to leave a comment, please click here

Latest firmware updates for Asus routers fix CSRF security flaws

Users of Asus RT-N and RT-AC series routers should install the latest firmware updates released for their models because they address vulnerabilities that could allow attackers to hijack router settings.The flaws were discovered by researchers from security consultancy outfit Nightwatch Cybersecurity and leave many Asus router models exposed to cross-site request forgery (CSRF) attacks.CSRF is an attack technique that involves hijacking a user's browser when visiting a specially crafted website and forcing it to send unauthorized requests to a different website -- or in this case, the router web-based administration interface accessible over the local area network (LAN).To read this article in full or to leave a comment, please click here

Worth Reading: Digital advertising takes a hit

But how effectively does that information work to meet advertiser goals? As advertisers including P&G, which spends billions of dollars each year on all its advertising for brands including Crest, Old Spice, and Gillette, have tried to assess the effectiveness of their increasing digital ad budgets, they’ve discovered that hyper-targeting consumers doesn’t always work. —Technology Review

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State of the WAN: 50% of WAN traffic is in the cloud

This week, SD-WAN vendor Aryaka released its “2017 State of the WAN Report,” which summarizes a global study conducted by the vendor that looks at WAN trends across a number of verticals and across every region of the globe for 2016.The study was conducted by aggregating data from Aryaka’s customer base. The global SD-WAN vendor has analyzed connectivity to and from over 5,000 locations around the world across more than 550 enterprise organizations. The network data was rolled up and analyzed to see what’s happening on the enterprise WAN.RELATED: SD-WAN: What it is and why you will use it one day Aryaka also provided a comparison with last year’s data set, which provides insight into how things have changed over the past 12 months.To read this article in full or to leave a comment, please click here

State of the WAN: 50% of WAN traffic is in the cloud

This week, SD-WAN vendor Aryaka released its “2017 State of the WAN Report,” which summarizes a global study conducted by the vendor that looks at WAN trends across a number of verticals and across every region of the globe for 2016.The study was conducted by aggregating data from Aryaka’s customer base. The global SD-WAN vendor has analyzed connectivity to and from over 5,000 locations around the world across more than 550 enterprise organizations. The network data was rolled up and analyzed to see what’s happening on the enterprise WAN.RELATED: SD-WAN: What it is and why you will use it one day Aryaka also provided a comparison with last year’s data set, which provides insight into how things have changed over the past 12 months.To read this article in full or to leave a comment, please click here

CCNA Wireless – CCNA Wireless Notes Chapter 1

I’ve started studying for the CCNA wireless exam and thought I would put my notes online. I always learn better when writing and hopefully my notes can be of assistance to someone else. These notes are based on reading the official certification guide “CCNA Wireless 200-355 Official Cert Guide“.

Basic wireless theory

Wireless LANs are based on the 802.11 standard.

Wireless LANs is a lot about Radio Frequency (RF) and planning of the RF environment.

When alternating current is sent through the antenna electric and magnetic fields propagate out and away as traveling waves. They travel along each other and are at right angles to each other.

Electromagnetic waves do not travel in a straight line. They travel by expanding in all directions away from the antenna.

When the electromagnetic waves reach the receiver’s antenna, they induce an electrical signal.

Frequency

Frequency – The number of times a signal makes one complete up and down cycle in one second. Measured in Hertz (Hz)

The frequency range from 3 kHz to 300 GHz is commonly called RF. Types of devices in this frequency range is radar, radio, shortwave radio, television, FM radio, microwave etc. The main two frequency Continue reading

WiFi’s evolving role in IoT

This vendor-written tech primer has been edited by Network World to eliminate product promotion, but readers should note it will likely favor the submitter’s approach.

Internet of Things applications have diverse connectivity requirements in terms of range, data throughput, energy efficiency and device cost. WiFi is often an obvious choice because in-building WiFi coverage is almost ubiquitous, but it is not always the appropriate choice.  This article examines the role WiFi can play and two emerging IEEE standards, 802.11ah and 802.11ax.

Data transfer requirements for IoT vary from small, intermittent payloads like utility meters to large amounts of continuous data such as real-time video surveillance. Range requirements can span from very short distances for wearables to several kilometers for weather and agriculture applications.

To read this article in full, please click here

WiFi’s evolving role in IoT

This vendor-written tech primer has been edited by Network World to eliminate product promotion, but readers should note it will likely favor the submitter’s approach.

Internet of Things applications have diverse connectivity requirements in terms of range, data throughput, energy efficiency and device cost. WiFi is often an obvious choice because in-building WiFi coverage is almost ubiquitous, but it is not always the appropriate choice.  This article examines the role WiFi can play and two emerging IEEE standards, 802.11ah and 802.11ax.

Data transfer requirements for IoT vary from small, intermittent payloads like utility meters to large amounts of continuous data such as real-time video surveillance. Range requirements can span from very short distances for wearables to several kilometers for weather and agriculture applications.

To read this article in full or to leave a comment, please click here

WiFi’s evolving role in IoT

This vendor-written tech primer has been edited by Network World to eliminate product promotion, but readers should note it will likely favor the submitter’s approach.

Internet of Things applications have diverse connectivity requirements in terms of range, data throughput, energy efficiency and device cost. WiFi is often an obvious choice because in-building WiFi coverage is almost ubiquitous, but it is not always the appropriate choice.  This article examines the role WiFi can play and two emerging IEEE standards, 802.11ah and 802.11ax.

Data transfer requirements for IoT vary from small, intermittent payloads like utility meters to large amounts of continuous data such as real-time video surveillance. Range requirements can span from very short distances for wearables to several kilometers for weather and agriculture applications.

To read this article in full or to leave a comment, please click here

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