Security Startup SentinelOne Raises $70M
That makes $110 total raised for defending endpoints and servers.
CCDE – The CCDE Mindset
This post was written to help CCDE candidates get into the right mindset but is very applicable to network architects and network engineers in general.
We humans tend to have a lot of bias. Sometimes it’s based on experience but often it’s based on how pure a technology is or a bad implementation of a protocol. Often we don’t reevaluate our opinion so if we had a STP incident in the past, STP becomes inherently bad for all future.
Preparing for the CCDE from a technology standpoint is relatively easy compared to getting into the right mindset and getting enough exposure to network designs. Don’t get me wrong, it’s a technically difficult exam but the number of candidates taking the exam that have the right knowledge level of technology are far higher than the number of people actually passing the exam. I have seen this time and time again.
Because we have this bias we immediately base our feeling and design based on our feelings or previous experience without taking the business requirements and technical constraints into consideration.Yes, maybe MPLS was the best answer to the question from a technical standpoint but maybe there was a constraint that only Continue reading
Worth Reading: Windows 10 steps up ransomware defenses
The post Worth Reading: Windows 10 steps up ransomware defenses appeared first on 'net work.
Ciena Extends its Blue Planet Division Into Analytics
Customers of Blue Planet Analytics don't need to be Ciena customers.
Datanauts 068: System Management With Redfish
The Datanauts go deep on Redfish, an emerging IPMI replacement aimed at out-of-band infrastructure management for lots and lots of devices. Our guest is Jeff Autor. The post Datanauts 068: System Management With Redfish appeared first on Packet Pushers.OSPF TLVs: Taking advantage of improvements in computing power
OSPF was originally designed in an age when processors were much less capable, available memory was much smaller, and link bandwidths were much lower. To conserve processing power, memory, and n-the-wire bandwidth, OSPF was designed using fixed length fields (FLFs). TLVs are more difficult to process than an FLF; to process a set of FLFs, you build a structure that mimics the FLF formatting, and simple “impose” it on the memory location where you have stored the data to be decoded, as shown below.
In the FLF model, the structure can simply be imposed on the memory locations, and the values can be read directly. In the TLV model, each type code must be read to determine the kind of information and the length must be read to determine the size of the field. Only once these two items in the TLV header have been read can the actual data be related to a particular field in the resulting data structure.
In the intervening years, however, compute, storage, and network capabilities have increased dramatically; the following chart, taken from a book I’m working on, shows this growth since about the start of the “network era.”
As compute, storage, and Continue reading
Dictionary: Shallow Packet Inspection
Vendors marketing is getting overexcited with hyperbole and suddenly basic filtering such as access-lists are Deep Packet Inspection.
Packet munging for layer 2-4 is shallow packet inspection. Specifically, its when you match Ethernet MAC, IP Addresses and TCP/UDP port numbers but nothing else. At time of writing, shallow packet inspection is simple, cheap and part of the forwarding ASIC.
Devices that perform inspection at Layer 5-7 of the OSI model is deep packet inspection (DPI). This requires exponentially more complex handling of the data in the ASICs, awareness of data formats and flow operations. In addition, the applications that configure are complex and sophisticated (the CLI just doesn’t cut it).
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Worth Reading: Fix EULAs
The post Worth Reading: Fix EULAs appeared first on 'net work.