Archive for July, 2020

Reconnaissance Attacks

Posted: 31st July 2020 by ccna7guru in ITN
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In addition to malicious code attacks, it is also possible for networks to fall prey to various network attacks. Network attacks can be classified into three major categories: Reconnaissance attacks – The discovery and mapping of systems, services, or vulnerabilities. Access attacks – The unauthorized manipulation of data, system access, or user privileges. Denial of service – The disabling or corruption […]

FHRP Options

Posted: 24th July 2020 by ccna7guru in SRWE
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The FHRP used in a production environment largely depends on the equipment and needs of the network. The table lists all the options available for FHRPs. Hot Standby Router Protocol (HSRP)HRSP is a Cisco-proprietary FHRP that is designed to allow for transparent failover of a first-hop IPv4 device. HSRP provides high network availability by providing […]

DHCP Operation

Posted: 23rd July 2020 by ccna7guru in ITN

The DHCP Process: •When an IPv4, DHCP-configured device boots up or connects to the network, the client broadcasts a DHCP discover (DHCPDISCOVER) message to identify any available DHCP servers on the network. •A DHCP server replies with a DHCP offer (DHCPOFFER) message, which offers a lease to the client. (If a client receives more than one […]