A datalink can best be described as______.
A.
a driver for a Network Interface Card
B.
the software connecting the Internet Layer and the Physical Layer
C.
a device that provides Classless Inter-Domain Routing
D.
a logical object used for IP Multipathing
E.
a device instance
Explanation:
The command dladm is used to configure data-link interfaces in Sun Solaris. A
configured data-link is represented in the system as interface that can be used for TCP/IP. Each
data-link relies on either a single network device or an link aggregation device to send & recieve
packets.
Network interfaces provide the connection between the system and the network. These interfaces
are configured over data links, which in turn correspond to instances of hardware devices in the
system.
In the current model of the network stack, interfaces and links on the software layer build on the
devices in the hardware layer. More specifically, a hardware device instance in the hardware layer
has a corresponding link on the data-link layer and a configured interface on the interface layer.
This one-to-one relationship among the network device, its data link, and the IP interface is
illustrated in the figure that follows.
Network Stack Showing Network Devices, Links, and Interfaces:Reference: System Administration Guide: Network Interfaces and Network Virtualization
Hi there
What if you were to choose between A,B,C and D?
Regards
Tsar
C,D is not correct
c is correct
C isn’t right. E is the answer as in Solaris 11 the datalink level is where created network device instances reside.
E
Probably E
Network Devices and Datalink Names
From an administrative perspective, administrators create IP interfaces on top of datalinks. The datalink represents a link object in the second layer of the Open Systems Interconnection (OSI) model. The physical link is directly associated with a device and possesses a device name. The device name is essentially the device instance name, which contains the driver name and the device instance number. The instance number can have a value from zero to n-1, depending on how many NICs use that driver on the system.
For example, consider a Gigabit Ethernet card, which is often used as the primary NIC on both host systems and server systems. Some typical driver names for this NIC are bge and e1000g. When used as the primary NIC, the Gigabit Ethernet interface has a device name such as bge0 or e1000g0. Other driver names are nge, nxge, and so on.
In this Oracle Solaris release, the device instance name continues to depend on the underlying hardware. However, as a consequence of the separation between hardware and software layers, datalinks on top of these devices are not similarly bound. Thus these datalinks can be given names other than the device names on which they are configured.
Reference
https://docs.oracle.com/cd/E26502_01/html/E28986/geyrb.html
D
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