Networking and System Administration

MEDIA AND TOPOLOGIES Peer-to-peer networks are useful for only relatively small networks. They are often used in small offices or home environments. Client/server networks, also called server-centric networks, have clients and servers. Servers pro video centralized administration, data storage, and security. The client system requests data from the server and displays the data to the end user. The bus network topology is also known as a linear bus because the computers in such a network are linked together using a single cable called a trunk, or backbone. If a terminator on a bus network is loose, data communications might be disrupted. Any other break in the cable will cause the entire network segment to fail. In a start configuration, all devices on the network connect to a central devices, and this central devices creates a single point of failure on the network. In the ring topology, the network layout forms a complete ring. comp...

1. What are 10Base2, 10Base5 and 10BaseT Ethernet LANs 10Base2—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses baseband signaling, with a contiguous cable segment length of 100 meters and a maximum of 2 segments. 10Base5—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses baseband google_protectAndRun("ads_core.google_render_ad", google_handleError, google_render_ad); signaling, with 5 continuous segments not exceeding 100meters per segment. 10BaseT—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses baseband signaling and twisted pair cabling. 2. Explain the difference between an unspecified passive open and a fully specified passive open An unspecified passive open has the server waiting for a connection request from a client. A fully specified passive open has the server waiting for a connection from a pecific client. 3. Explain the function of Transmission Control Block...

What is Testing? The process of exercising software to verify that it satisfies specified requirements and to detect errors. The process of analyzing a software item to detect the differences between existing and required conditions (that is, bugs), and to evaluate the features of the software item (Ref. IEEE Std 829). The process of operating a system or component under specified conditions, observing or recording the results, and making an evaluation of some aspect of the system or component. What is Test Automation? It is the same as Automated Testing. What is Acceptance Testing? Testing conducted to enable a user/customer to determine whether to accept a software product. Normally performed to validate the software meets a set of agreed acceptance criteria. What is Accessibility Testing? Verifying a product is accessible to the people having disabilities (deaf, blind, mentally disabled etc.). What is Ad Hoc Testing? A testing phase where the tester tries to 'break' the sys...

NETWORK+ ACRONYMS AAA Authentication Authorization and Accounting ACL Access Control List ADF Automatic Document Feeder ADSL Asymmetric Digital Subscriber Line AES Advanced Encryption Standard AEP American Electric Power AFP AppleTalk Filing Protocol AH Authentication Header AM Amplitude Modulation AMI Alternate Mark Inversion APIPA Automatic Private Internet Protocol Addressing ARIN American Registry for Internet Numbers ARP Address Resolution Protocol ASP Application Service Provider ATM Asynchronous Transfer Mode BDF Building Distribution Frame BERT Bit-Error Rate Test BGP Border Gateway Protocol BNC British Naval Connector / Bayonet Niell-Concelman BootP Boot Protocol /Bootstrap Protocol BPDU Bridge Protocol Data Unit BRI Basic Rate Interface CHAP Challenge Handshake Authentication Protocol CIDR Classless inter domain routing CNAME Canonical Na...