cisco 200-301 q&as

cisco 200-301 q&as.NetFlow is a Cisco-specific technology that captures information about flows and can be used to implement network traffic statistics, bookkeeping based on outgoing traffic, network capacity planning, network monitoring, and numerous other network management functions. A stream is basically a session between two devices and must contain at least the source IP address, the destination IP address, and the inbound interface. Cisco uses ASICs to capture flow information. Cisco supports several NetFlow versions, the most common of which is version 5. The command show ip cache flow displays a summary of flow information, but an external NetFlow collector is required to collect long-term flow information.17J Two-Minute Sprint.Network Time Protocol.. NTP provides three methods of transmitting time messages: broadcast, unicast, and multicast. . NTPv3 supports authentication of messages using MD5 signatures. . You should build your own time server (this is often referred to as a local master clock) and implement NTPv3o use MD5 authentication.Do not use SNTP, as it does not support authentication.. The DHCP server assigns IP address parameters to the requesting host. On the Cisco IOSDHCP server, the address is specified in the addressspecified in the address pool. . If a network number is assigned to the address pool, be sure to exclude network addresses and directed broadcast addresses.. IP addresses are usually leased to hosts on a temporary basis. After the address lease is half over, the client will attempt to renew the previously acquired addressing information.. If an address conflict is checked. the associated address will be removed from the DHCP address pool and the administrator will manually resolve such issues. To check for address conflicts, use the command show ip dhcp conflictoSimple Network Management Protocol