VRRP VS HSRP

What are the differences between VRRP and HSRP?

Besides VRRP not being proprietary, there are a few minor differences between the protocols as well:

With HSRP, each interface must have an IP address that is separate from the HSRP group address. VRRP lets you share the Master's interface IP address.
On Cisco devices, VRRP is configured to preempt by default, whereas HSRP is not configured to preempt by default.
On Cisco devices, HSRP sends hellos every 3 seconds and has a dead timer of 10 seconds. VRRP sends advertisements every 1 second and has a dead timer of roughly three times the advertisement interval.
VRRP can be configured to learn the timer configuration from the Master.




HSRP
1) Cisco propriteray

2) 1 Active & 1 standby router & 1 or more listening routers

3) use virtual ip add as gateway

4) hello 3 sec & holddown timer 10 sec

5) we can enable preempt manually (standby 1 preempt)

6) multicast at:224.0.0.2 (ver1), multicast at:224.0.0.102 (ver2). Both versions use udp port 1985

VRRP
1) open standard (ietf)

2) 1 master & 1 or more backup routers

3) real ip address can be used (highest ip address of interface)

4) 1 sec & hold-down timer 3 sec

5) By default preempt is enabled

6) multicast at:224.0.0.18 – IP 112


REFRENCE

11 foods that lower cholesterol

Oats. An easy first step to improving your cholesterol is having a bowl of oatmeal or cold oat-based cereal like Cheerios for breakfast. It gives you 1 to 2 grams of soluble fiber. Add a banana or some strawberries for another half-gram. Current nutrition guidelines recommend getting 20 to 35 grams of fiber a day, with at least 5 to 10 grams coming from soluble fiber. (The average American gets about half that amount.)

Barley and other whole grains. Like oats and oat bran, barley and other whole grains can help lower the risk of heart disease, mainly via the soluble fiber they deliver.

Beans. Beans are especially rich in soluble fiber. They also take awhile for the body to digest, meaning you feel full for longer after a meal. That's one reason beans are a useful food for folks trying to lose weight. With so many choices — from navy and kidney beans to lentils, garbanzos, black-eyed peas, and beyond — and so many ways to prepare them, beans are a very versatile food.

Eggplant and okra. These two low-calorie vegetables are good sources of soluble fiber.

Nuts. A bushel of studies shows that eating almonds, walnuts, peanuts, and other nuts is good for the heart. Eating 2 ounces of nuts a day can slightly lower LDL, on the order of 5%. Nuts have additional nutrients that protect the heart in other ways.

Vegetable oils. Using liquid vegetable oils such as canola, sunflower, safflower, and others in place of butter, lard, or shortening when cooking or at the table helps lower LDL.

Apples, grapes, strawberries, citrus fruits. These fruits are rich in pectin, a type of soluble fiber that lowers LDL.

Foods fortified with sterols and stanols. Sterols and stanols extracted from plants gum up the body's ability to absorb cholesterol from food. Companies are adding them to foods ranging from margarine and granola bars to orange juice and chocolate. They're also available as supplements. Getting 2 grams of plant sterols or stanols a day can lower LDL cholesterol by about 10%.

Soy. Eating soybeans and foods made from them, like tofu and soy milk, was once touted as a powerful way to lower cholesterol. Analyses show that the effect is more modest — consuming 25 grams of soy protein a day (10 ounces of tofu or 2 1/2 cups of soy milk) can lower LDL by 5% to 6%.

Fatty fish. Eating fish two or three times a week can lower LDL in two ways: by replacing meat, which has LDL-boosting saturated fats, and by delivering LDL-lowering omega-3 fats. Omega-3s reduce triglycerides in the bloodstream and also protect the heart by helping prevent the onset of abnormal heart rhythms.

Fiber supplements. Supplements offer the least appealing way to get soluble fiber. Two teaspoons a day of psyllium, which is found in Metamucil and other bulk-forming laxatives, provide about 4 grams of soluble fiber.

REFRENCE

Assassin's Creed rouge

Assassin's Creed rouge for pc

For each platform, a part of Ubisoft's Assassin's Creed series will offer raised and platforms such as PlayStation 3 and Xbox 360 generations ago are not exempt from this rule. Rogue's name is part of the platform is released and ubsoft confirmed that the PC version of the game is under production and will be released early in 2015.

Sugar alcohol

wha is Sugar alcohol ?

A sugar alcohol is a kind of alcohol prepared from sugar These organic compounds are a class of polyols, also called polyhydric alcohol, polyalcohol, or glycitol. They are white, water-soluble solids that occur naturally and are used widely in the food industry as thickeners and sweeteners. In commercial foodstuffs, sugar alcohols are commonly used in place of table sugar (sucrose), often in combination with high intensity artificial sweeteners to counter the low sweetness. Unlike sugars, sugar alcohols do not contribute to the formation of tooth cavities.


Production and structure
Sugar alcohols have the general formula HOCH2(CHOH)nCH2OH. In contrast, sugars have two fewer hydrogen atoms, for example HOCH2(CHOH)nCHO or HOCH2(CHOH)n-1C(O)CH2OH. The sugar alcohols differ in chain length. Most have five- or six carbon chains, because they are derived from pentoses (five-carbon sugars) and hexoses (six-carbon sugars), respectively. They have one OH group attached to each carbon. They are further differentiated by the relative orientation (stereochemistry) of these OH groups. Unlike sugars, which tend to exist as rings, sugar alcohols do not. They can however be dehydrated to give cyclic ethers, e.g. sorbitol can be dehydrated to isosorbide.
Sugar alcohols occur naturally and at one time, mannitol was obtained from natural sources. Today, they are often obtained by hydrogenation of sugars, using Raney nickel catalysts. The conversion of glucose and mannose to sorbitol and mannitol is given:
HOCH2CH(OH)CH(OH)CH(OH)CH(OH)CHO + H2 → HOCH2CH(OH)CH(OH)CH(OH)CH(OH)CHHOH
More than a million tons of sorbitol are produced in this way annually. Xylitol and lacticol are obtained similarly. Erythritol on the other hand is obtained by fermentation of glucose and sucrose.

Health effects

Of these, xylitol is perhaps the most popular due to its similarity to sucrose in visual appearance and sweetness. Sugar alcohols do not contribute to tooth decay.[2]
However, consumption of sugar alcohols does affect blood sugar levels, although less than that of "regular" sugar (sucrose). Sugar alcohols may also cause bloating and diarrhea when consumed in excessive amounts

HTC's handheld camera

HTC has announced a waterproof, wide-angled digital camera, the RE, capable of taking still photographs and videos.
The RE's cylindrical design includes a sensor that automatically turns the device on when it is picked up and only two button controls.

An app lets wirelessly connected smartphones and tablets stream the footage live and play it back later.

Experts said the device would compete with GoPro's products, but that it compared unfavourably to them.

RE
The RE is 9.7cm (3.8in) tall and weighs 65.5g (2.3oz), making it lighter but taller than GoPro's cameras
However, HTC suggested its gadget had the potential to "change the face of mobile photography".




"Combining incredible hardware with unrivalled software, HTC is reinventing the way we think about imaging," said the Taiwanese firm's chief executive Peter Chou.

"We are taking you out from behind the viewfinder and putting you back where you belong, at the heart of the action."

The company also unveiled an Android smartphone with 13 megapixel (MP) front and rear cameras at a New York launch event.

HTC recently reported net income of $640m New Taiwan Dollars ($21m; £13m) for its last quarter, reversing a loss from the previous year. However, its sales were lower.




No viewfinder
The RE features a 16MP camera and is capable of shooting in 1080p "full high-definition" video at normal speed, and 720p in slow motion.

A tap of its shutter button, at its base, takes a photo, while a longer press starts a video recording. A switch on its side allows users to change the video mode between real speed, slow motion and time lapse.

It does not feature a screen of its own, but can record to a SD memory card, stream material to a live YouTube channel and send footage to an associated Android or iOS app.

The suggestion is that owners use it in situations that they do not need to monitor framing - freeing them up to watch events directly as well as record them - thanks to the inclusion of a lens that captures a 146 degree field-of-view.

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what is Cloud iridescence ?

Cloud iridescence is the occurrence of colors in a cloud similar to those seen in oil films on puddles, and is similar to irisation. It is a fairly uncommon phenomenon, most often observed in altocumulus, cirrocumulus, lenticular clouds and cirrus clouds. The colors are usually pastel, but can be very vivid. Iridescence is generally produced near the sun, with the sun's glare masking it, so it is more easily seen by hiding the sun behind a tree or building. Other aids are dark glasses, or observing the sky reflected in a convex mirror or in a pool of water.

Iridescent clouds are a diffraction phenomenon caused by small water droplets or small ice crystals individually scattering light. Larger ice crystals produce halos.
If parts of clouds have small droplets or crystals of similar size, their cumulative effect is seen as colors. The cloud must be optically thin, so that most rays encounter only a single droplet. Iridescence is therefore mostly seen at cloud edges or in semi-transparent clouds, and newly forming clouds produce the brightest and most colorful iridescence. When a thin cloud has droplets of similar size over a large extent, the iridescence takes on the structured form of a corona, a central bright disk around the sun or moon surrounded by one or more colored rings. In one instance a lunar corona was observed, with the iridescent cirrus cloud 11–13.6 km (36,000–45,000 ft) above the mean sea level at a temperature of −70 °C (−94 °F). The pure corona was 9.5 km (31,000 ft) above the mean sea level, at a temperature of −60 °C (−76 °F).

connection refused

error connection refused







ssh and telnet cannot connect
why?
because you forget install ssh server and client
how to solve?

sudo apt-get install openssh-server openssh-client

good luck