CompTIA Network+ Certification Study Guide part 3 ppt

... It isn’t until 19 83 that IBM releases the XT with the 8086 processor (and option to add an 8087 math co-processor). 80286 (16-bit processor) produced in 1982.  8 038 6 (32 -bit processor) produced ... more than 30 0 vacuum tubes and approximately one mile of wire. Because the war prevented them from completing a patent on their computer, the computer was dismantled when the physics d...

Ngày tải lên: 04/07/2014, 13:20

... pro- tocols to be used. Common protocols associated with VPN transmission security are PPTP, L2TP, SSH, and IPSec. PPTP and L2TP are used to establish a secure tunnel connection between two sites. ... passive topology. In other words, when a computer is FIGURE 1 .3 A Bus Topology. Exam Warning One of the testable items on the Network+ exam is being able to identify a topology based on...

Ngày tải lên: 04/07/2014, 13:20

... get? T3 lines are the fastest, but they are also the most expensive. T1 A: and T3 lines are thousands of dollars a month, and may be more than your organization needs. Before deciding on a particular ... 46 MEDIA ISSUES 49 CABLE TESTERS AND TROUBLESHOOTING 58 SIMPLEX, HALF-DUPLEX, AND FULL-DUPLEX 63 CABLING 63 CABLE MANAGEMENT 67 LAN TECHNOLOGIES AND STANDARDS 69 CONNECTORS 75 OTHER MEDI...

Ngày tải lên: 04/07/2014, 13:20

... to as a bit, and 8 bits of data make a byte. A word is considered 4 bytes, which is essentially 32 bits … the same length as an IP (Internet Protocol) address, which we will learn about in Chapter ... Type Bandwidth Capacity 10Base2 Coax 10 Mbps 10Base5 Coax 10 Mbps 10BaseT UTP or STP (Category 3 or higher) 10 Mbps 100BaseTX UTP or STP (Category 5 or higher) 100 Mbps 10BaseFL Fiber-optic...

Ngày tải lên: 04/07/2014, 13:20

... segment, with each tap spaced 2 1/2 m apart. Determining how long a 10Base5 cable could be lengthened using dif- ferent segments can be calculated using the 5-4 -3 rule. A 10Base5 cable can have up ... type. It also supports distances of 30 0 m over a new 2000 MHz km MMF. 10GBaseLX4 that uses wavelength division mul-  tiplexing and supports ranges of 240 m and 30 0 m over MMF, or 10...

Ngày tải lên: 04/07/2014, 13:20

... Table 3. 3 shows an example of what is contained in the routing table. CHAPTER 3: Network Devices 120 FIGURE 3. 5 Enabling a Connection with Windows XP Professional. Note that in Figure 3. 4, ... Table 3. 3 Information Contained in a Routing Table Destination Adjacent Router Hops Network 1 Router A 1 Network 1 Router B 2 Network 2 Router B 2 Network 2 Router C 3 Network 3 Router...

Ngày tải lên: 04/07/2014, 13:21

... security. First, by adding a link internally, you FIGURE 3. 7 A Screened Host Firewall. FIGURE 3. 6 A Dual-Homed Host Firewall. Network Devices 133 examined by outsiders. In other words, all traffic ... configured with identical protocols and settings. FIGURE 3. 11 A Site-to-Site VPN Established Between Two Remote Offices. CHAPTER 3: Network Devices 130 The creation of these DMZ segment...

Ngày tải lên: 04/07/2014, 13:21

... large number of active attacks that a hacker can launch against a wireless network. For the most part, these attacks are identical to the kinds of active attacks that are encountered on wired ... doing regular wireless site surveys to see if someone has Common Exploits of Wireless Networks 2 13 violated your company security policy by placing an unauthorized AP on the network, regardles...

Ngày tải lên: 04/07/2014, 13:21

... POP3 uses port 110 for communication. Exam Warning Remember that IMAP4 uses Port 1 43 (both TCP and UDP) for communication. CHAPTER 6: The OSI Model and Networking Protocols 274 forwarded to a particular ... following for the Network exam: The name service uses UDP Port 137 The datagram service uses UDP Port 138 The session service uses TCP Port 139 Networking Protocols 269 in Berkeley,...

Ngày tải lên: 04/07/2014, 13:21

... each hop, a router decrements (reduces) this FIGURE 7.2 The IPv4 Header. Bits 4 4 8 16 16 3 13 8 16 8 32 32 0 – 40 Variable Version Header Length TOS (Type or Class of Service) Total Length Identification Flags Fragment ... IPv6 2 93 Feature Comparison The IPv6 architecture contains integrated features that are not contained in IPv4. Table 7 .3 contrasts the features of IPv4 and IPv...

Ngày tải lên: 04/07/2014, 13:21