circle the correct letter for the given picture

... INCORRECT The _ layer is responsible for the delivery of a message from one process to another The layer is responsible for. .. to the next without errors The _ layer links the ... INCORRECT The process-to-process delivery of the entire message is the responsibility of the _______ layer. 10 [...]... layers of the OSI model 4 6 INCORRECT The address, also known as the ... CHAPTER 3: The correct answer for each question is indicated by a 1 INCORRECT Before data can be transmitted, they must be transformed... the _ address must be consulted INCORRECT

Ngày tải lên: 16/01/2015, 08:59

... purchased IBM stock for $10,000 as an investment At the end of 2014 Stassi was still holding the investment, but the stock’s market value was now $8,000 How should Stassi account for the $2,000 unrealized ... revolutionary foreign government expropriated property held as an investment by Rozek Inc If the loss is $70,000 before applicable income tax savings of $21,000, how will the loss be presented in the income ... expenses of $1.7 million from continuing operations in 2014 The company therefore has income before income taxes of $800,000 During 2014 the company discontinued and sold its unprofitable chemical

Ngày tải lên: 24/11/2016, 14:37

... wanna-bes The wanna-bes use the tools to commit the crime without really knowing how it works because they don’t have to Rather than the criminal rising to the skill set needed for the crime, the skill ... Trang 1Information Security: The Big Picture - SANS GIAC © 2000 1Information Security: The Big Picture – Part I Stephen Fried Hello, and welcome to Information Security: The Big Picture My ... be authorized both for access to the system itself as well as any activities they may perform while on the system There must be no undocumented features in the system One of the more common causes

Ngày tải lên: 18/10/2013, 18:15

... through the string and sent to the other can The receiving can then repeats the vibrations... simultaneously The diagram in the slide illustrates this point The two phones in the picture ... contact the operator at the central office and tell them the name of the person they wanted to talk to The operator would then connect the caller’s plug to the plug of the person ... modem The modem then converts the digital information into an analog format Once the data is converted to an analog format, it is sent over the phone line to the receiving modem The

Ngày tải lên: 22/10/2013, 16:15

... own information to it, then sends it to the next layer down the stack Once the packet reaches the bottom of the stack, it travels along the network wire to the remote host, then travels up the ... floor The third floor prepares the various courses by making the soup, tossing the salad, cooking the beef, and baking the pie Once all this is done they hand the food off to the fourth floor The ... gives the “Hello There” to the Application Layer of the protocol stack The Application Layer creates an empty packet and places the “Hello There” inside of it The Application Layer then sends the

Ngày tải lên: 22/10/2013, 16:15

... to get feedback before they send their work to the publisher—it’s not uncommon for them to share their work with a number of trusted readers first That strategy is important for your essays, too ... Directly Related to the ThesisAs important as the amount of support is its relevance to the thesis What good are ten supporting paragraphs if they’re not supporting the right idea? Read the following ... “lying with silence.” For each paragraph, note the idea and function in the space provided The first two paragraphs are done for you Then, answer the questions that follow When was the last time you

Ngày tải lên: 25/10/2013, 17:20

... it who the real Victim is, how long the attack should last, and any other information the Agents will need. The Handler then relays that information to the Agents and off they go. What the Victim ... address then re-directs the ping to all the other hosts on that network, which then act as the agents for the attack Being good little agents, they want to reply to the request However the ... putting this information into the formula you get a unique mathematical value for each file The values for all the files are then stored for future reference You also recalculate the values

Ngày tải lên: 26/10/2013, 23:15

... click on forms to get the knowledge-based risk assessment forms for WinNT, Unix, Win95, Mac 8.X, etc. The SANS website is home to GIAC, the Global Incident Analysis Center, and to the SANS training ... very risky indeed There are more secure replacements available for these services, like SSH for remote shells Many firewalls would also stop the spoofed packets from the attacker, correctly noticing ... also have detected the recon probes before the attacker went in for the kill Early warning is much better than real-time or after the fact notification of system compromise (The problem is, a

Ngày tải lên: 04/11/2013, 12:15

... to the server The server analyzes the response to determine if it is the correct response for that particular challenge If it is correct, the authentication is confirmed If it is incorrect, the ... dates, etc. If the world is moving toward the use of certificates, there must be some formal standard for specifying the use and format of certificates There is, and it’s called the ISO Authentication ... Trang 1Information Security: The Big Picture - SANS GIAC © 2000 1Information Security: The Big Picture – Part VI Stephen Fried Trang 2Information Security: The Big Picture - SANS GIAC

Ngày tải lên: 04/11/2013, 12:15

... the top. Then summary information about the packet. The trace begins with the content of the detect. RPC attacks like this are part of the Top Ten list (www.sans.org/topten.htm). Notice all the ... The Big Picture - SANS GIAC © 2000 27 The sensor outside the firewall is positioned to detect attacks that originate from the Internet DNS, email and web servers are the target for ... they own you • Worth the time to give connection attempts to these systems an extra look Intrusion Detection - The Big Picture - SANS GIAC © 2000 11 The “goodhost” filters in the

Ngày tải lên: 09/12/2013, 17:15

... The Big Picture – SANS GIAC ©2000 16 Why you want others to run them • Remember port 365? • Name servers, mail servers, and web servers draw the most fire on the Internet What if they had their ... fit in the big picture? P= Probability of A firewall is the primary opportunity for attack negation Before we dive down into the bits and bytes of firewalls, let’s consider their place in information ... determine what the attackers are going to do, before they do it There are countermeasures that can be applied before the attack gets to you For instance, if an Internet Service Provider detects the attack,

Ngày tải lên: 10/12/2013, 14:16

... research. Pull the color ads in your area for the consumer electronic stores such as Circuit City and the like. Check out the computers. What do they all have? 8 Intrusion Detection - The Big Picture ... idea. If you are shopping for a scanning toolset, it is reasonable to assume that either of the big three (ISS, NAI, Symantec) scan for the same number of vulnerabilities. They will all come up with ... scanning for a minute. Ever get a phone call, pick up the phone and no one was there? You might have been scanned. 7 Intrusion Detection - The Big Picture – SANS GIAC ©2000, 2001 7 Phone Scanning for

Ngày tải lên: 10/12/2013, 14:16

... more than just the initial outlay for the hardware and software There is maintenance, training, and the employees’ time Management knows the purchase is just the tip of the iceberg Their job is ... another The main difference is that in the SBS booklet the detailed information is shown up front, and is in the help files on the NSWC checklist Trang 23Intrusion Detection - The Big Picture ... We need to balance the cost of the cure (or risk reduction) against the benefits The challenge is to determine the cost-effective fixes for the common attacks This is a reason the Top Ten vulnerabilities

Ngày tải lên: 10/12/2013, 14:16

... This is the more detailed log file Notice the rule that found the detect is displayed at the top Then summary information about the packet is given The trace begins with the content of the detect ... think everything is OK since the firewall stops the attacks and then they get lax, drop their defenses, someone makes a small misconfiguration of the firewall and boom, the site is dealing with a ... the data from the kernel space and pass it to the application There are implementations for Windows (winpcap-based - the Windows version of libpcap) and Unix It is reliable and has the big advantage

Ngày tải lên: 10/12/2013, 14:16

... that they are attacking a production system, they will open up their bag of tricks and reveal their intentions be they to extract proprietary information, hack the external Web site, add another ... the slide above, the packet is addressed to TCP port 143, the IMAP service If the site does not allow IMAP through the firewall, then there will never be a SYN/ACK response, the TCP three-way ... system is the focus of lots of probes This can happen for a number of reasons We had a researcher give out the name and IP address of a research system when I worked for the Navy, and for the next

Ngày tải lên: 10/12/2013, 14:16

... degree of risk they will be uncomfortable with that information The more specific and clear that information is, the more they squirm The idea is to take an inventory of the data sources... ... consider the cost and the benefits... exist on the machine It is trivial for a determined hacker to get that information Therefore, many administrators do not bother hiding the last logged ... to pass if they are running their system at an acceptable risk 6 - 12 Risk Management: The Big Picture. .. You have spent the day learning about the big picture The real question

Ngày tải lên: 10/12/2013, 14:16

... What do the various components do? • Many IDS web sites never state what the infernal things do! – How do we implement them? • Where do the components fit in the “big picture”? To summarize the ... This makes the tradeoff ratio around 20 to 200 host intrusion detection systems for the cost of a single network sensor The other issue influencing the deployment decision is that the more frequently ... of the client host and of the requested service; the wrappers do not exchange information with the client or server applications, and impose no overhead on the actual conversation between the

Ngày tải lên: 17/01/2014, 08:20

... 4. For the syntheses of the polyamide-based pentamers I-III (Figure 3, Figure 4) and the heptamer (the ligation product 15 is shown in Figure 7) the solid phase peptide syntheses and the ... 3. The synthesis of the tetrazine dicarbonic acid derivate was performed as described by [15]. The synthesis procedure of the corresponding dansyl de- rivative was carried out according to the ... 1288.5 for the dication. No signal was found for the 4-fold adduct. By using 5 µmol of the tetrazine 6 the 4-fold adduct could be seen after 30 min in the mass spectrum. 10. Ligation of the...

Ngày tải lên: 25/10/2012, 11:00