Category: Learn CCNA

Subnetting Review To identify subnets, you will “borrow” bits from the host ID portion of the IP address: The number of subnets available depends on the number of bits borrowed. –The available number of subnets = 2s, I which s is the number of bits borrowed. The number …

Static vs. Dynamic Routes   What Is a Dynamic Routing Protocol? Routing protocols are used between routers to determine paths to remote networks and maintain those networks in the routing tables. After the path is determined, a router can route a routed protocol to the learned networks.   …

Interconnection Technologies   Determining Equipment and Cabling Needs Each link provides adequate bandwidth for the total aggregate traffic over that link.   Advantages of EtherChannel Logical aggregation of similar links between switches Load-shares across links Viewed as one logical port to STP Redundancy   Redundant Topology Redundant topology …

VLAN-to-VLAN Overview Network layer devices combine multiple broadcast domains.   Dividing a Physical Interface into Subinterfaces Physical interfaces can be divided into multiple subinterfaces.   Routing Between VLANs with 802.1Q Trunks   Summary Inter-VLAN routing using a router on a stick utilizes an external router to pass traffic …

Issues in a Poorly Designed Network Unbounded failure domains Large broadcast domains Large amount of unknown MAC unicast traffic Unbounded multicast traffic Management and support challenges Possible security vulnerabilities   VLAN Overview Segmentation Flexibility Security   Designing VLANs for an Organization VLAN design must take into consideration the implementation of a …

Cisco IOS User Interface Functions The CLI is used to enter commands. Operations vary between routers and switches, but both use the same CLI. The Enter key instructs a device to parse and execute a command. The CLI uses a hierarchy of commands in its configuration-mode structure. Users …