Abstract The Open Systems Interconnect (OSI) model is a standard reference model for the communication between two end users. Seven different layers make up the OSI model: physical, data link, network, transport, session, presentation, and application. This paper will cover the type of security that is associated with each level of the OSI model. Physical Layer The physical layer is where the actual communication occurs between devices. The security of the physical layer pertains to the actual hardware. The vulnerabilities of the physical layer include: Power outage Environmental control loss Hardware theft, damage or destruction Unauthorized hardware changes (i.e.; removable media, data connections) Detachment …show more content…
Switches could flood all traffic to the VLAN ports and not forward to the proper port. This could result in data being intercepted by any device that is connected to the VLAN. Stations could be force direct communication with other stations which ends up bypassing subnets and firewalls. Weak authentication and encryption on a wireless network could allow for unauthorized connections to the network, data and devices. Data link layer controls can be implemented to ensure the security of the transmissions. By using MAC address filtering the stations are identified by not only the MAC address but are cross-referenced with the logical access or physical port. Firewalls should be between layers, ensuring physical isolation from one another. Wireless application must be monitored consistently and carefully for unauthorized access. In order to secure the wireless network, the use of the built-in encryption, authentication, and MAC filtering must be implemented with strong passwords. Network Layer The third layer of the OSI model is the network layer. This layer is responsible for end to end packet delivery. The network layer issues request to the data link layer and responds to requests from the transport layer and issues requests to the data link layer. The procedural and functional process of sending different
A: OSI stands for Open System Interconnection. The main aim of the OSI layer is to implement protocols of a networking framework.
Layer 3: Network - The way that the data will be sent to the recipient device is determined in this layer. Logical protocols, routing and addressing are handled here.
The fifth layer is the session layer this establishes a connection,this layer makes and sets up the connection using co ordinates and could terminate conversations links. the session layer produces services that make authentication after an interruption and not only that but it can reconnect.and as well as the transporting layer it can also have the TCP and the UDP can provide services for all most all applications.An application layer is an abstraction layer that specifies the shared protocols and interface methods used by hosts in a communications network. The application layer abstraction is used in both of the standard models of computer networking; the Internet Protocol Suite (TCP/IP) and the Open Systems Interconnection model (OSI model).Although both models use the same term for their respective highest level layer, the detailed definitions and purposes are different.In TCP/IP, the application layer contains the communications protocols and interface methods used in process-to-process communications
Privacy: In a wireless network all the devices are able to hear data traffic within their ranges which can be a threat to the security of the link. IEEE 802.11 counters this problem by offering a privacy service option that raises the security level of the 802.11 network to that of a wired network.
Zhu, J., & Ma, J. (2004). A new authentication scheme with anonymity for wireless environments. Co
1. Application (in terms of cabling infrastructure): The application layer is the OSI layer closest to the end user, which means both the OSI application layer and the user interact directly with the software application. When determining resource availability, the application layer must decide whether sufficient network or the requested communication exists.. (OSI_model#Layer_7:_application_layer)
Wireless security in 802.11 is less robust and has many security flaws that can be exploited by an attacker. Security best practice for wireless networks depends on a defense in depth strategy, with five control layers:
The OSI (Open System Interconnection) model is a set of specifications that allow computers around the world to openly communicate. It is pivotal to understanding and developing computer to computer communications in a network. Each layer plays a role in the process of sending and receiving data. The application layer is the top layer (layer seven) it promotes communication between programs and lower-layer network services. The services at this layer allow the network to decipher a program's request and the program to decipher data sent from the network. The Application layer protocols, programs handles formatting, procedure, security, synchronization, and any other requirements with the network. The Presentation Layer (layer 6) acts as a translator. For instance these protocols decode the jpg/jpeg files sent within the Web server’s HTTP response. So, in the last step (the Application layer) we enter the Web address and it took us to the Web site. This step allows us to see the images and content of the site. The Session Layer (layer 5) regulates and controls the communication between two nodes on the network. It is an ongoing exchange of data between the two and keeps the connection between them for the duration. It keeps the communication secure, detects whether or not the communication has been cut off and if it has it determines where to restart the
The OSI Model is a model is used to define how data is theoretically passed on a network. Each layer is responsible and has its own duties for a network. The name of layer 3 in the OSI is the Network Layer. This layer is responsible for creating the paths for the transmission of data across the network. This layer provides routing and switching capabilities, as well as, internetworking, congestion control, and packet sequencing (Beal, 1999).
To improve security, the Wi-Fi uses various built-in WEP encryption technologies to prevent attacks from
Layer 3 is the network layer and utilises multiple common protocols to perform routing on the network. Protocols consist of the Internet Protocol (IP), packet sniffing and DoS attacks such as Ping floods and ICMP attacks. Because of their layer 3 nature, these types of attacks can be performed remotely over the Internet while layer 2 attacks primarily come from the internal LAN.
The first three layers of the OSI is typically what a router needs to route traffic. The first three layer are physical, data link and network. The highest level the OSI decide where to forward traffic to is the transport layer which is located in the host layers.
Users that have a wireless LAN should add security to ensure only intended users have access. Some safeguards include use of WEP (Wired Equivalent Privacy) encryption, IPsec, WPA (WiFi Protected Access), with a firewall or DMZ. A DMZ (demilitarized zone) is a physical or logical sub-network that separates the LAN from other entrusted networks
In the modern day, wireless technology is buzzing and becoming more and more popular and widely used as each day passes by. Many big corporations like Apple and Microsoft use wireless storage, aka the “cloud,” to provide their users with convenience. Unfortunately, with the continuous advancement of wireless technology, securing sensitive information becomes a complicated hassle. Wireless security is extremely important because many people store sensitive data such as bank account and credit card numbers wirelessly. Not to mention, many people also perform tasks such as banking wirelessly. Wireless security is a major risk to everyone who owns wireless devices, not just big companies. Having strong and effective wireless security is important, so it must be set up properly in order to protect personal information and prevent hardware damage.
It has long been known that the defense of any infrastructure is only one method of creating a protected perimeter is ineffective, as often the most dangerous attacks are caused by factors within the network. Building a security system Wi-Fi network should take into account all of these factors in order to come as close to a similar level of security of wired and wireless network segments.