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Download 31 Days Before Your CCENT Certification (Cisco Networking by Scott Bennett PDF

By Scott Bennett

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3. The sending host responds with an ACK to complete the connection. The hosts can then communicate and send segments reliably. If any segments are not acknowledged within a specified time, they are retransmitted. These sequenced segments are assembled by the TCP process and delivered to the upper-layer applications for de-encapsulation into data. 3: Table 29-4 describes the differences between TCP and UDP. 1: Often, ISPs provide to customers application layer services such as HTTP, FTP, SMTP, POP3, and IMAP4.

This choice is often driven by a lack of availability of other types of connections, expense, or a lack of teenagers in the household. ■ Digital Subscriber Line (DSL) provides a faster-than-dialup, yet more expensive, connection over phone lines. A DSL modem uses a different frequency than a phone, so the user can be on the phone and online at the same time—an optimal configuration for teenagers and smallbusiness users alike. ■ A cable modem provides an Internet connection over the same coaxial cable used to provide television.

These sequenced segments are assembled by the TCP process and delivered to the upper-layer applications for de-encapsulation into data. 3: Table 29-4 describes the differences between TCP and UDP. 1: Often, ISPs provide to customers application layer services such as HTTP, FTP, SMTP, POP3, and IMAP4. In addition, an ISP can provide secure services such as HTTPS and SFTP. A web server provides HTTP and HTTPS, a file server provides FTP, and a mail server provides POP3 and IMAP4. 4: When you set up a web server, you can choose to provide web access through HTTP or more secure access through HTTPS.

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