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Cisco CCNA Boot Camp Training:
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Experience the Benefits of CCNA and CCDA Certifications
Technical certification is a sound investment in your career. Although
certification does not guarantee success, research has shown that
it can have a significant impact on:
and productivity on the job
Build Your Skills And Your Career: Certify Yourself
Cisco® CCNA certification lays the foundation for all
other Cisco® certifications.
Cisco® Certified Network Associate certification solidifies
and markets your knowledge of installing, configuring, and operating
routed LANs and WANs. Optimizing WAN traffic through Internet access
solutions that reduce bandwidth, and reducing WAN costs using features
such as access list filters are also professional tasks of a CCNA.
At the IP level, when a packet is forwarded, the destination IP
address remains the same, but since each interface has a separate
MAC address, the packetís destination hardware address changes as it
crosses each interface on the way to the destination.
Subnetting extends the network portion of the address to allow a
single network to be logically divided into sections (subnets).
Routers look at each of these subnets as distinct networks, and will
route among them. This helps in managing large networks by isolating
traffic between portions. IP performs a bit-wise ANDing process to
determine local and remote networks. A subnet/network number is the
lowest value numerically in that network or subnet. EX:
192.168.100.0. All subnet numbers have binary 0s for the host part
of the subnet number. It is typical that groups of hosts tend to
communicate routinely with each other, and communicate less outside
the group. When logically subnetting a network, network resources,
geographic distances, and communication patterns need to be
considered in order for the network to operate efficiently. To
subnet a network, we add one or more bits to the default subnet
mask, which reduces the number of bits for the host address.
A broadcast address is an address that exists in IP containing all
1s (FFFF.FFFF.FFFF). This address is reserved for an IP broadcast
into that network. All hosts on that subnet should receive this
packet. Broadcast addresses address all devices on a LAN.
A multicast address is a type of packet destined for a specific set
A unicast address addresses an individual LAN interface card.
Functional addresses are valid only on Token Ring. They identify one
or more interfaces that provide a particular function.
The purpose of the subnet mask is to borrow bits from the host field
and designate them as the subnet field.