By Inc., CISCO Cisco Systems, Cisco Networking Academy Program, Inc., ILSG Cisco Systems, Aries Cisco Networking Academy Program
Cisco Networking Academy software CCNA 1 and a couple of spouse advisor, Revised 3rd version, is the Cisco licensed textbook to exploit along model 3.1 of the Cisco Networking Academy application CCNA 1 and CCNA 2 web-based classes. the themes coated offer you the mandatory wisdom to start your instruction for the CCNA certification examination (640-801, or 640-821 and 640-811) and to go into the sphere of community management.
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Additional info for Cisco Networking Academy Program: CCNA 1 and 2 companion guide
Table 1-8 AND Operation AND 0 1 0 0 0 1 0 1 The OR operation, as shown in Table 1-9, also takes two input values. If one value is 1 or both values are 1, the output is 1. Just like the AND operation, there are four combinations of input values. However, in an OR operation, three of the combinations generate a 1 output, and one combination generates a 0 output. The two networking operations that use Boolean logic are subnetwork masking and wildcard masking. Masking operations provide a way to ﬁlter addresses.
Two of the most popular web browsers are Internet Explorer (IE) and Netscape. Although they are identical in the task they perform, there are differences between them. Some websites might not support the use of one or the other, so it can be beneﬁcial to have both programs installed on the computer. Table 1-1 compares the characteristics of these two web browsers. Table 1-1 Microsoft Internet Explorer Versus Netscape Communicator IE Communicator Integrated with other Microsoft products First popular browser Takes up more disk space Takes up less disk space Displays HTML ﬁles and performs e-mail, ﬁle transfers, and other functions Displays HTML ﬁles and performs e-mail, ﬁle transfers, and other functions Standard web browsers cannot display many special, or proprietary, ﬁle types.
For example: ■ A binary 0 might be represented by 0 volts of electricity (0 = 0 volts). ■ A binary 1 might be represented by +5 volts of electricity (1 = +5 volts). Computers are designed to use groupings of 8 bits. This grouping of 8 bits is called a byte. In a computer, 1 byte represents a single addressable storage location. These storage locations represent a value or a single character of data, such as an ASCII code. The total number of combinations of the eight switches being turned on and off is 256 (or 28).