CompTIA Network+ Certification Study Guide part 14 ppt

... networking, a number of devices either have taken over the roles of these devices or are a predominant part of a modern network envi- ronment. These devices are crucial to a network’s ability to handle ... correct computer on the network. For these computers to communicate, however, a device is needed to guide the TCP/IP network traffic to its destination. This is where routers come in...

Ngày tải lên: 04/07/2014, 13:21

... to a friendly domain name such as microsoft.com. In 1984, DNS became part of ARPANet, and would eventually play a major part resolving domain names on the Internet. Also during the mid-1980s, ... them from completing a patent on their computer, the computer was dismantled when the physics department needed storage space that was being used by the machine. The distinction of being first...

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... 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. ... traveling over.  Encapsulating Protocol The protocol, such as Point-to-Point Tun- neling Protocol (PPTP), Layer 2 Tunneling Protocol (L2TP), IPSec, or Secure Shell (SSH), that is wrapped ar...

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... thousands of dollars a month, and may be more than your organization needs. Before deciding on a particular con- nection for your network, try to determine what they will be using it for, how ... ability to dial into the Internet, but isn’t connected to the other offices. Office B is in another part of the country from the other offices, but doesn’t have its network interconnected to the...

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... more expensive than UTP. DAMAGE AND DEFENSE… Physical Security Physical security is an important part of any network. In terms of cabling, you should try to keep as much cabling as possible out ... can send a thousand times this amount. As we’ll see later in this chapter, the features of a particular type of cable can vary greatly. Because different types of cabling are available to use...

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... installing several runs of cable at a time, you don’t want to be confused as to which cable runs to a particular computer or location. By labeling the cables, this confusion is removed, and you’ll ... 10Base5 cable can have no more than 100 taps per cable 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

Ngày tải lên: 04/07/2014, 13:20

... associated with VPN are Point-to-Point Tunnel- ing Protocol (PPTP), Layer 2 Tunneling Protocol (L2TP), SSH, and IP Secu- rity (IPSec). PPTP and L2TP are used to establish a secure tunnel connection ... the Inter- net) that the information is traveling over.  Encapsulating Protocol The protocol (PPTP, L2TP, IPSec., Secure Shell [SSH]) that is wrapped around the original data.  Passenger ....

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 ... attack. Creating a hijacked AP DoS requires additional tools that can be found on many security sites. Many apartments and older office buildings are not prewired for the high- tech networks in us...

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... communication. Exam Warning Remember that IMAP4 uses Port 143 (both TCP and UDP) for communication. CHAPTER 6: The OSI Model and Networking Protocols 274 forwarded to a particular set of DNS servers. These servers ... troubleshooting. Networking models can be very helpful to you. In this chapter, we cov- ered three of them in particular, the OSI model, the DoD model, and the Microsoft mode...

Ngày tải lên: 04/07/2014, 13:21

... in decimal?” If only it was that easy! Instead, you’ll need to know how to do the conversion as part of a more complex process, usually in calculating subnet masks. It’s easy to calculate subnet ... activities as a network administrator. TCP/IP In the 1970s, Internet Protocol (IP) was developed as part of the Transmission Control Protocol effort to provide logically addressed and struc...

Ngày tải lên: 04/07/2014, 13:21