The Windows 7 command-line utility that can tell you if the TCP/IP stack of another system on the network is functioning normally is called __________________. Ping.exe 7. The Windows 7 command-line utility that enables you to generate DNS request messages and then transmit them to specific DNS servers on the network is called __________________. Nslookup.exe 8. Most networks use __________________ to dynamically assign addresses and configure computers to use them.
1. What purpose does the OSI stack perform? Is used by equipment vendors, Internet services providers and cable television (catv) service provides when designing and implementing telecommunications networks. 3. What are the advantages of organizing the functions of th OSI module into layers?
4. LAN-to-WAN • LAN-to-WAN Domain is where the IT Infrastructure links to a Wide Area Network (WAN) and the Internet. Responsible for applying the defined security controls to prevent unauthorized network access 5. WAN • Wide Area Network (WAN) Domain connects remote locations. Manages client’s firewalls and router configurations .The goal is to allow users the most access possible by making sure the data traveling in and out is safe 6.
What role does each protocol play in the video call process? SIP-is an application level signaling protocol for terminating, setting up, and modifying real-time video/audio sessions between participants over an IP data network. H.320-It is used for narrow-band visual telephone systems and terminal equipment with specified technical requirements. H.323-Is the standard that addresses bandwidth, multimedia transport and control, call signaling and control or multi-point and point-to-point video/audio teleconferences. Video Teleconferencing (VTC) is a communication technology that allows people located at two or more different locations to visually see and talk face-to-face meeting from thousands of miles apart, these systems can transmit bi-directional video, data streams and audio during the session.
What is the frequency range used by 802.11a, and what modulation technique is used? 2.4GHz, OFDM 10. 11. Define MIMO as it applies to 802.11n. a space division multiplexing technique where the data stream is split into multiple posts called spatial streams 12.
4. B. PC and switch D. Router and hub E. wireless access point and switch 5. B. collisions can happen, but the algorithm defines how the computers should notice a collision and how to recover. 6. C. two PCs, with one cabled to a router Ethernet port with a crossover cable and the other PC cabled to another router Ethernet port with a crossover cable.
Each device on the network has a unique numerical address and the Internet uses the DNS (Domain Name System) to allocate each a corresponding human-readable address (Woods, 2013a). Information is requested from a server and is sent using the packet switching and TCP/IP (Transmission Control Protocol/Internet Protocol) system (Jamison, 2001; Woods, 2013b). This involves breaking large files into smaller ‘packets’, allocating each packet addressing information, and sending them via different routes to be reassembled – including verification – at their destination (Jamison, 2001). Constantly evolving, the Internet has become an all-encompassing social, communicative and collaborative tool that is arguably essential to modern life (Leiner et al., 2012). 2.