One of the objects (groups) that can be managed is the ip group with the object identifier (1.3.6.1.2.1.4) in which (1.3.6.1.2.1) is the identifier of MIB-2 and (4) defines the ip group. In an agent, this object has 20 simple variables and three tables. One of the tables is the routing (forwarding) table with the identifier (1.3.6.1.2.1.4.21). This table has eleven columns, the first of which is called the ipRouteDes, which means the destination IP address. Assume that the indexing is based on the first column. Assume the table has four rows at the moment with the destination IP addresses (201.14.67.0), (123.16.0.0), (11.0.0.0), and (0.0.0.0). Show how SNMP can access all four instances of the second column, called ipRouteIfIndex, which defines the interface numbers through which the IP should be sent out.