What is TDM?

Correct Answer: WDM is conceptually the same as FDM, except that the multiplexing and demultiplexing involve light signals transmitted through fiber optics channel

Correct Answer: FDM is an analog technique that can be applied when the bandwidth of a link is greater than the combined bandwidths of the signals to be transmitted

Correct Answer: The address resolution protocol(ARP) is used to associate the 32 bit IP address with the 48 bit physical address, used by a host or a router to find the physical address of another host on its network by sending a ARP query packet that includes the IP address of the receiver The reverse address resolution protocol (RARP) allows a host to discover its Internet address when it knows only its physical address

Correct Answer: Server-based network: Provide centralized control of network resources and rely on server computers to provide security and network administration peer-to-peer network: computers can act as both servers sharing resources and as clients using the resources

Correct Answer: One of the main causes of congestion is that traffic is often busy If hosts could be made to transmit at a uniform rate, congestion would be less common Another open loop method to help manage congestion is forcing the packet to be transmitted at a more predictable rate This is called traffic shaping

Correct Answer: The internet address( IP address) is 32bits that uniquely and universally defines a host or router on the internet The portion of the IP address that identifies the network is called netid The portion of the IP address that identifies the host or router on the network is called hostid

Correct Answer: With static IP addressing, a computer (or other device) is configured to always use the same IP address With dynamic addressing, the IP address can change periodically and is managed by a centralized network service

Correct Answer: The LMHOSTS file is a static method of resolving NetBIOS names to IP addresses in the same way that the HOSTS file is a static method of resolving domain names into IP addresses An LMHOSTS file is a text file that maps NetBIOS names to IP addresses; it must be manually configured and updated

Correct Answer: A scope is a range, or pool, of IP addresses that can be leased to DHCP clients on a given subnet

Correct Answer: DNS servers often must communicate with DNS servers outside of the local network A forwarder is an entry that is used when a DNS server receives DNS queries that it cannot resolve locally It then forwards those requests to external DNS servers for resolution