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IPv6 over IPv4 tunneling
Wednesday, August 26th, 2009IPv6 over IPv4 tunneling allow access to the IPv6 Internet in absence of an IPv6 native access provider (Or interconnection between any IPv6 islands over an IPv4 infrastructure). Cisco routers support automatic (6to4, ISATAP) and configured IPv6 over IPv4 tunneling.
Tags: IPv4, IPv6
CCNA 640-802 Bible – Identify Common Problems Associated with IP Addressing and Host Configurations
Friday, July 17th, 20091. An administrator issues the command ping 127.0.0.1 from the command line prompt on a PC. If a reply is received, what does this confirm?
A: The PC has connectivity with a local host.
B: The PC has connectivity with a Layer 3 device.
C: The PC has a default gateway correctly configured.
D: The PC has connectivity up [...]
CCNA 640-802 Bible – Calculate and Apply VLSM IP Addressing Scheme
Thursday, July 16th, 20091. In the implementation of VLSM techniques on a network using a single Class C IP address, which subnet mask is the most efficient for point-to-point serial links?
A: 255.255.255.0
B: 255.255.255.240
C: 255.255.255.248
D: 255.255.255.252
Tags: 640-802 Bible, IP Subnetting, VLSM
CCNA 640-802 Bible – Describe the IP Addressing,DHCP and DNS server
Thursday, July 16th, 20091. Which of the following describe private IP addresses? (Choose two.)
A:addresses chosen by a company to communicate with the Internet
B:addresses that cannot be routed through the public Internet
C:addresses that can be routed through the public Internet
D:a scheme to conserve public addresses
Tags: 640-802 Bible, DHCP, DNS, IP address
IPv6 EUI-64 interface addressing
Sunday, June 7th, 2009One of IPv6’s key benefits over IPv4 is its capability for automatic interface addressing. By implementing the IEEE’s 64-bit Extended Unique Identifier (EUI-64) format, a host can automatically assign itself a unique 64-bit IPv6 interface identifier without the need for manual configuration or DHCP. This is accomplished on Ethernet interfaces by referencing the already unique [...]
Subneting and Summarization
Tuesday, April 28th, 2009Subneting
The process of extending the default subnet mask creates a counting range in the octet that the subnet was extended into, which can be used to represent subnetworks. This allows a single Class A, B, or C network to be subdivided into many smaller groups with each group, or subdivision treated as if it were [...]
IP Address Classes and CIDR
Tuesday, April 28th, 2009IP addresses are divided in to ‘classes’, based on the decimal value represented in the first octet. This class definition is referred to as the First Octet Rule. There are five classes of IP addresses: classes A, class B, class C, class D; and class E, but only class A, B and C addresses are [...]
IP Addressing
Tuesday, April 28th, 2009An IP address is a network layer (Layer 3) address that uniquely identifies a host, including network components and devices, on a TCP/IP network. An IP address is composed of 32 binary bits and consists of two parts: a network ID and a host ID.
. The Network ID identifies the TCP/IP hosts that are located [...]