...without its action being logged by the server [5]. Don’t take this 64KB data as a little piece of cake. This small chunk of memory can be, for instance, username, passwords (in most cases they are in cleartext) and even private keys. Worse more, an attacker is able to request this chunk of data again and again to get as much information as possible, until he obtains what he ultimately wants [5]. In all, Heartbleed makes the Man-In-The-Middle attack more efficient than usual. Remediation A quick and intuitive patch is to denying heartbeat request messages that ask for more data than the payload needs [7]; in version 1.0.1g of OpenSLL, some bounds checks to prevent the buffer over-read is added such as the follows: if(1+2+ payload +16> s->s3->rrec.length)return0;/* silently discard per RFC 6520 sec. 4...
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...the instructions in the program trigger sequences of a simple action on the executing machine . in computing , a system call is the programmatic way in which a computer program requests a services from the kernel of the operating system it is executed on cpu .system call provides an essential interface b/w a process and operating system . I/O operations: Disk tapes serial lines and other devices must be communicated at a low level. The user need only specify the device and the operation to perform on it, while the system converts that request into device- or controller-specific commands. User level programs cannot be trusted to access only devices they should have access to and to access them only when they are otherwise unused .the term i/o is used to describe any program operation or device that transfers data to or form a computer and to or form a peripheries device .every transfer is an output from one device and an input to another .for instance, a keyboard or computer mouse is an input device for a computer , While monitors and printers and output devices. Devices for communication b/w computers, such as modems and network cards , typically perform both input and output operations. File system manipulation: There are many file in the file creation, deletion allocation and naming that users should not have to perform. Blocks of disk space are used by flies and must be tracked. Deleting a file requires removing the name files and must be checked to assure proper file...
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...1. Comprehensive Radio frequency (RF) audit and site surveys must be conducted for wireless network implementations. 2. Wireless coverage must be analyzed periodically to ensure that adequate and efficient wireless signal strength is available throughout the campus, and the wireless signals does not radiate and spread beyond campus boundaries and compound walls in order to prevent traffic sniffing, encryption cracking, unauthorized access, and any other malicious network attacks from outside the campus. 3. If the wireless connectivity is required to provide for the remote office location outside the campus, it should be deployed with point-to-point narrow beam directional antennas only. Implementation of Omni Antenna, Panel/Flat Antenna, or Sector Antenna must be...
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...PART 1. There will be a Lunch and Learn to cover Ken 7’s updated security policies.2. End users will be notified of the new password policy: User passwords will be a minimum of eight letters, numbers and special characters. The passwords must be changed every 90 days. Users will not be allowed to use the past six passwords. 3.Inform end users weekly update checks will be ran for all software and any security patches will be applied during non-normal business hours.4. Remind end users it is not only stupid to write passwords down, it is against company security policy. End users will be reminded that passwords should be easy to remember but cannot be found in the dictionary. Firewalls are a key part of keeping networked computers safe and secure. All computers deserve the protection of a firewall, whether it’s the thousands of servers and desktops that compose the network of a Fortune 500 company, a traveling salesperson’s laptop connecting to the wireless network of a coffee shop, or your grandmother’s new PC with a dial-up connection to the Internet....
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...Exercise One Nt1310 Week 1 In: Computers and Technology Exercise One Nt1310 Week 1 NT1310:Week 1 Telecommunications By: Kenneth Martin You are an IT Network Specialist and are required to develop the design of the company’s telephone system for its new building which will begin construction in a few months. In order to get a background which will help when developing the new system, your supervisor asked you to research the current Plain Old Telephone Service (POTS) currently used by the company. You must research the system components and report back to your supervisor , the Telecommunications Manager, within a week. 1. Describe a local land line phone system based on the following Landline Telephone Components: a. Local Loop a local loop is the wired connection from a telephone company's central office in a locality to its customers' telephones at homes and businesses. This connection is usually on a pair of copper wires called twisted pair. The system was originally designed for voice transmission only using analog transmission technology on a single voice channel. Today, your computer's modem makes the conversion between analog signals and digital signals. With Integrated Services Digital Network (ISDN) or Digital Subscriber Line (DSL), the local loop can carry digital signals directly and at a much higher bandwidth than they do for voice only. b. Central Office In telephone communication in the United States, a central office (CO) is an office in a locality...
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...ITT Technical Institute NT1310 Physical Networking Student Course Package Bring this document with you each week Students are required to complete each assignment and lab in this course package on time whether or not they are in class. Late penalties will be assessed for any assignments or labs handed in past the due date. The student is responsible for replacement of the package if lost. Table of Contents Syllabus 2 Student Professional Experience 19 Graded Assignments and Exercises 23 Labs 47 Documenting your Student Professional Experience 57 ITT Technical Institute NT1310 Physical Networking Onsite Course SYLLABUS Credit hours: 4.5 Contact/Instructional hours: 56 (34 Theory Hours, 22 Lab Hours) Prerequisite(s) and/or Corequisite(s): Prerequisites: NT1210 Introduction to Networking or equivalent Course Description: This course examines industry standards and practices involving the physical components of networking technologies (such as wiring standards and practices, various media and interconnection components), networking devices and their specifications and functions. Students will practice designing physical network solutions based on appropriate capacity planning and implementing various installation, testing and troubleshooting techniques for a computer network. Where Does This Course Belong? | | | NT2799 | | | | | | | | NSA Capstone | | | | | | | Project | | | | | NT2580...
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...ITT TECHNICAL INSTITUTE NT1310 Physical Networking GRADED ASSIGNMENTS ------------------------------------------------- Student Professional Experience Project NSA SPE Project 1 (to be completed by the end of NT1310): Install, Configure, Test, Maintain and/or Document the Worksite Local Area Network and Its Components Purpose The purpose of the Student Professional Experience (SPE) project is to provide you an opportunity for work experience in your field or in a related field to add to your résumé. You may have an opportunity to serve your community or work for a local employer for a project that will take between 20 and 30 hours. Project Logistics Career Services will identify an employer with needs in the following areas: Network related tasks (mostly confined to the LAN and Microsoft Windows Server 2008 environments) Students are expected to practice various skills discussed in all the technical courses in Quarters 1 through 3 of the NSA program at an employer’s site on network related tasks (more confined to the LAN and Microsoft Windows Networking with Server 2008 environments) that would involve installation, configuration, testing, maintenance and documentation of the worksite network and its components, and to properly document the technical information in all involved activities. Such documentation will be used as the source material for Items 2 and 3 defined in the Deliverables section of this document. Possible example projects could...
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...have one domain controller (not recommended), there is nothing to do since all roles must be on this server, but if you have multiple servers you should move some of theese roles on to more servers. It is also important to be aware of what servers are Global Catalog servers, especially if you have more than one domain and even if only one domain, they will be prefered by applications like Exchange server. It is recommended to place the forest roles on one Domain Controller (DC) and the domain roles on another server. If not all Domain Controllers are Global Catalog servers, it is also important to place the infrastructure master on a server that is NOT a Global Catalog server. Recommended Best Practice setup of FSMO roles. Domain Controller #1 Place the two forest roles on this server. * Schema Master * Domain Master Domain Controller #2 Place the domain roles on this server. * RID Master * Infrastructure Master * PDC Emulator If more domains exist in the forest, place the domain roles on a server in theese domains like Domain Controller #2 Global Catalog configuration. In Windows 2008 Active Directory all Domain Controllers are by default Global Catalog servers, personally...
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...Christopher A. Lee Sr. NT1310 Week 3 Assignment.Network Topology Paper Network topology is the arrangement of the various elements (links, nodes, etc.) of a computer network.[1][2] Essentially, it is the topological[3] structure of a network, and may be depicted physically or logically. Physical topology refers to the placement of the network's various components, including device location and cable installation, while logical topology shows how data flows within a network, regardless of its physical design. Distances between nodes, physical interconnections, transmission rates, and/or signal types may differ between two networks, yet their topologies may be identical. A good example is a local area network (LAN): Any given node in the LAN has one or more physical links to other devices in the network; graphically mapping these links results in a geometric shape that can be used to describe the physical topology of the network. Conversely, mapping the data flow between the components determines the logical topology of the network. Contents * 1 Topology * 1.1 Point-to-point * 1.2 Bus * 1.3 Star * 1.4 Ring * 1.5 Mesh * 1.6 Tree * 1.6.1 Advantages * 1.6.2 Disadvantages * 1.7 Hybrid * 1.8 Daisy chain * 2 Centralization * 3 Decentralization * 4 See also * 5 References * 6 External links Topology There are two basic categories of network topologies:[4] 1. Physical topologies ...
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