Download How to Master CCNA by René Molenaar PDF

By René Molenaar

Tips on how to grasp CCNA covers every thing you must be aware of which will move Cisco's CCNA Routing & Switching examination. you are going to find out about the fundamentals of networking just like the OSI version, the variation among IPv4, IPv6, TCP, UDP and extra. additionally, you will tips on how to configure protocols like spanning-tree, VLANs and trunking in your switches and the way routers use routing protocols to construct their routing desk. This e-book covers every little thing for the ICND1 (100-101), ICND2 (200-101) and CCNA mixed examination (200-120).

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Locate the Cisco IOS image. 3. Locate and apply configuration (if available). This is what it looks like on a real switch: Boot Sector Filesystem (bs) installed, fsid: 2 Base ethernet MAC Address: 00:11:bb:0b:36:00 Xmodem file system is available. The password-recovery mechanism is enabled. Initializing Flash... flashfs[0]: 8 files, 4 directories flashfs[0]: 0 orphaned files, 0 orphaned directories flashfs[0]: Total bytes: 15998976 flashfs[0]: Bytes used: 10424320 flashfs[0]: Bytes available: 5574656 flashfs[0]: flashfs fsck took 9 seconds.

252 01-00-5e-00-00-fc Type dynamic static static static In the example above you see an example of an ARP table on a Computer A. 2 has been mapped to the MAC address 00:0C:29:63:AF:D0. 2 MAC: BBB In this example we have two computers and you can see their IP address and MAC address. We are sitting behind computer A and we want to send a ping to computer B. The ARP table is empty so we have no clue what the MAC address of computer B is. The first thing that will happen is that computer A will send an ARP Request.

IP addresses can be configured statically or dynamically. If you go the static way you have to configure the IP address yourself on your computer, router or switch. Dynamic means we use DHCP (Dynamic Host Configuration Protocol). DHCP is a server process that assigns IP addresses from a “pool” to network devices. A cisco router can be used as a DHCP server but you will also see this often on Microsoft or Linux servers. 254. 20. 254 The computer has no IP address so it will broadcast this DHCP discover message.

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