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ICND1 Ports&Layers
ICND1 Ports and layers
| Question | Answer |
|---|---|
| What Layer is Telnet | Application |
| What Layer are SMTP Gateways | Application |
| What Layer is FTP | Application |
| What Layer is POP3 | Application |
| What Layer is NFS | Application |
| What Layer is SNMP | Application |
| 802.3z and 802.3ab are what standard | Gigabit Ethernet |
| What Layer is CDP | Data-link |
| Common Fields in UDP and TCP | Source Port, Destination Port, Checksum |
| Port 20, TCP | FTP Data |
| Port 21, TCP | FTP Control |
| Port 23, TCP | Telnet |
| Port 25, TCP | SMTP |
| Port 53, UDP, TCP | DNS |
| Port 67,68 UDP | DHCP |
| Port 69 UDP | TFTP |
| Port 80, TCP | HTTP/WWW |
| Port 110, TCP | POP3 |
| Port 161, UDP | SNMP |
| Port 443, TCP | SSL / HTTPS |
| What layer is FCS used | Data-link layer error-correction |
| ACK, sequencing and flow control are what layer | Layer 4 - Transport |
| What layer is a hub | Layer 1 - Phsyical - it just repeats |
| What two layers are WAN's operating in | Transport and Datalink |
| What protocol delivers Best effort: IP or TCP | IP |
| Transport layer divides stream of data into segments and may add reliability information. Packets are created when the network layer adds layer 3 addresses and control information | OSI Data Encapsulation Process |
| Switch to Switch cable type | Crossover |
| PC to switch cable type. | Straight Through |
| Router to router cable type. | Crossover |
| PC to PC cable type. | Crossover |
| PC to Hub cable type. | Straight Through |
| Router to Switch cable type. | Straight Through |
| PC to Router cable type. | Crossover |
| Switch to Hub cable type. | Crossover |
| Hub to Hub cable type. | Crossover |
| Excessive Collissions on a switch indicates what layer 1 problem | Most likely exceeded cable length. |
| What is console cable type. | Rollover |
| What size is an ethernet runt less than | 64 Bytes |
| What size is a giant / jabber / jumbo frame usually greater than | 1518 |
| What is 'inside local address' in NAT | The IP address that is assigned to a host on the inside network |
| What is 'inside global address' in NAT | A legitimate IP address that represents one or more inside local IP addresses |
| What is "Outside local address' in NAT | The Ip address of an outside host as it appears to the inside network. Not necessarily a legitimate address, it was allocated from inside routable addresses |
| What is 'Outside global address' in NAT | The IP address assigned to a host on the outside network by the hosts owner. |
| what is router default boot up mode | Flash -> TFTP -> ROM |
| Where can boot code be stored on a router | Flash, TFTP, ROM |
Created by:
pkillur
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