OSI model

Paper 1 – USF Infrastructure The video describes the core of the University of South Florida infrastructure that is two redundant devices that provides 100Gbps and 10Gbps connectivity to the distribution layer devices. Cat 5e or Cat 6 wires are used for connections throughout the campus. The computers are on the edge of the network meaning they are the closest to the user. The wires are connected to the network by a patch cord going into a wall outlet that then leads into a wiring closest that…

1. Ethernet Ethernet is a combination of computer networking technologies most commonly used in local, metropolitan, and wide area networks. 2. Server A computer or computer program that manages access and distributes information through a centralized service in a network. 3. IP Transit IP Transit, also known as Internet Transit, is what allows traffic from a network to cross or "transit" to a provider network. This type of service is generally used to connect one of the smaller internet…

This report investigates three mini cases as provided by the brief (insert book title), these include Big E. Bank, Global consultants and Atlas advertising. The first mini case Big E. Banking (BEB) discusses the problems with connecting networks together over a wide area, all using different protocols to communicate. The second mini case addresses the problems with software acquisition including the methods used to communicate across different software products. The third mini case investigates…

3. Results and discussion 3.1. Grafting of CNT on the ramie fabric The schematic representation for the mechanism of ramie fiber surface treatments is shown in Fig. 2. For the alkali treatment of ramie fiber, the NaOH reacts with the hydroxyl groups of the ramie fiber as shown in Fig. 2(a). During silane treatment, the hydrolysis of silane takes place initially (Fig. 2(b)) which then reacts with the active hydroxyl functionalities in ramie fiber (Fig. 2(c)). Each silane molecule has three…

1. I agree that increasing the router memory to infinite cannot control congestion because even if routers have an infinite amount of memory, congestion gets worse, because by the time packets reach to the front of the queue, they have already timed out (repeatedly), and duplicates have been sent. 2. Flow Control vs Congestion Control It ensures that the sender only sends what the receiver can handle. The congestion control makes sure that everyone across a network has a "fair" amount of…

Figure 3 demonstrates the 3 layers that make up the SDN structure. Lowest layer represents the Infrastructure Layer or Forwarding Plane, mainly focusing on data forwarding but it also takes care of monitoring local information and gathering statistics. Next layer represents the Control Layer or Control Plane which is responsible for programming and managing the Forwarding Plane. Control Plane makes use of the information gathered by the Forwarding Plane in order to define the route and operation…

IPsec is often installed on today's IPv4 networks to protect communication over VPN networks. It is used to access VPN, as well as between VPNs. IPv6 transition mechanisms can use this kind of infrastructure to achieve a certain level of protection, even in the absence of IPv6 IPsec. Remote IPv4 hosts access private networks by establishing encrypted VPN access to a gateway device set up for this purpose. If the same host is capable of IPv6, it can break through an IPv6 tunnel over this…

1. What file transfer protocols would you recommend? Be prepared to support your recommendations. The Data Link Layer allows various protocols to transmit data between nodes in a network. This layer involves framing of data, synchronization of nodes and multiplexing of nodes. The Transfer Control Protocol (TCP) and High-Level Data Link Control (HDLC) ensure the reliability of data. They ensure that data transfers from one node to the other without any error. Moreover, the data is transferred…

Name Professor Institution Date Ann’s bad AIM 1. What is the name of Ann’s IM buddy? The name of Ann’s IM buddy is sec558user1 2. What was the first comment in the captured IM conversation? Here is the secret recipe. I just downloaded it from the file server. Just copy to a thumb drive and you are good to go > 3. What is the name of the file Ann transferred? Recipe.docx 4. What is the magic number of the file you want to extract (first four bytes)? 0x504B0304 (one byte=8bits=2 hex digits) 5.…

Chapter 7: 7.1 Frame synchronization: The beginning and end of each frame must be recognizable. 7.2 The function accomplished by a receiving entity to limit the amount or rate of data that is sent by a transmitting entity. 7.3 A flow control protocol in which the sender communicates a block of data and then awaits an acknowledgment before transmitting the next block. 7.4 • The buffer size of the receiver may be limited. • On a shared medium, such as a LAN, it is usually sensible not…