COMPTIA NETWORK CERTIFICATION STUDY GUIDE 5TH EDITION PDF DOWNLOAD

more, the terminology that stems from it is, in fact, still widely in use. For instance, when viewing Figure 8.3, you will see terminology in use such as packet-switching exchange (PSE), customer premises equipment (CPE), and data circuit-terminating equipment (DCE). When looking at an X.25 netwo[r]

Layer 4: TransportLayer 4 is the transport layer. As the name implies, it is responsible for transporting the data from one node to another. It provides transparent data transfer between nodes and manages the end-to-end flow control, error detection, and error recovery.The transport layer protocols i[r]

situation for the network.Configuring Windows Client Computers for Wireless Network SecurityWindows XP and Vista provide support for 802.1x protection on wireless networking connections.Windows XP and Vista integrated wireless networking into the OS to a high degree. Windows XP and[r]

CHAPTER 6: The OSI Model and Networking Protocols 236closely together and that is why it’s hard to discuss one without the other. As a matter of fact, no matter how long you are in networking, you will find the OSI model is referenced on a daily basis all the way from the beginning as a student to a[r]

Network Interface Hardware/SoftwareThe network interface is established through the NIC. Each type of NIC uses a different type of connector to connect to the physical medium. The connector types are delineated in the IEEE 802 specifications. Each network technology is delineated[r]

framework to share relevant network management information. This information is stored in a Management Information Base (MIB) and con-tains a set of objects, each of which represents a particular type of network information such as an event, an error, or an active session. SNMP uses UD[r]

CHAPTER 6: The OSI Model and Networking Protocols 276layers for standard, reliable network communications: physical, data link, network, transport, session, presentation, and application. The acronym commonly used to remember this is (in reverse order): all people seem to need data pro[r]

of closed systems, you should choose wireless APs that support this feature.SniffingOriginally conceived as a legitimate network and traffic analysis tool, sniffing remains one of the most effective techniques in attacking a wireless network, whether it’s to map the network as part[r]

works. This means that data at the higher levels of the OSI model, particu-larly Transmission Control Protocol/Internet Protocol (TCP/IP) data, is also encrypted. Because much of the TCP/IP communications that occur between hosts contain a large amount of frequently repeating and well-known pat-tern[r]

utilized such as authentication, access control, password protection, and virtual private networks (VPNs).Despite its flaws, WEP still offers a level of security provided that all its features are used properly. This means taking great care in key management, avoiding default options, and ensuring a[r]

that you do see a question about some of the tools used to conduct these surveys. Remember that the tools used to conduct site surveys and audits are essentially the same tools an attacker uses to gain access to a wireless network.CHAPTER 5: Wireless Networking 222WLANs are inherently insecu[r]

spoofing with invalid ARP requests. These tools, such as ArpWatch, notify an administrator when ARP requests are detected, allowing the administrator Common Exploits of Wireless Networks 215to take the appropriate action to determine whether someone is attempting to hack into the network.Anoth[r]

The TCP/IP suite provides the functionality specified in the OSI model using the four related layers of the DoD model: network interface, inter-net, host-to-host, and application. This is because it’s hard to map TCP/IP to the OSI model, also discussed in the previous chapter. The network