Open Shortest Path First (OSPF) is a routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) working group of the Internet Engineering Task Force (IETF). The working…
Link-State Routing
Link-state routing differs from distance-vector routing in that each router knows the exact topology of the network. This reduces the number of bad routing decisions that can be made because every router…
Routing Protocols
There are two types of dynamic routing protocols: Interior Gateway Protocols (IGP) and External Gateway Protocols (EGP). IGPs are used to exchange routing information within an autonomous system (AS), which is a…
CCNP 642-845-Update(Apr-2009) New Questions
1. The Cisco SDM will create a QoS policy that provides services to two types of traffic. Which two statements indicate the default QoS parameters that are created by SDM? (Choose two.)…
Cisco Cheat Sheets
Below is the link list to essential Cisco related cheat sheets (collection of notes or quick reference guides whatever). By the way, we don’t recommend to cheat anything and/or do a cheating…
CCIE R&S Core Knowledge Question(5)
1. What is the maximum size of an IP packet in bytes? Highlight for answer: 65535 bytes 2. What is the multicast address that an OSPF designated router will used to send…
Basic IP Phone Configuration on Cisco Call Manager Express
Before showing you how to configure a basic IP phone on Cisco CallManager Express (CCME), you need first to understand the concepts of ephone and ephone-dn. In CCME, “ephone” (short for Ethernet…
SIP Trunking With Call Manager Express
For many years now, telephony voice services for businesses and enterprises have been provided by using legacy PBX systems connected to the Public Switched Telephone Network (PSTN) using TDM connections (T1/E1 ISDN…
Call Manager Express CME Deployment Scenarios
The Cisco Unified CallManager Express (CME) solution not only has the benefit of voice-data integration on a single platform, but offers also flexible deployment options. The Cisco CME on its basic form…