First 3 Sections Flashcards
How do you enable privileged commands?
“en” (Enable)
What command is used to change the hostname of a router?
hostname [name of device]
How do you show the interface status and configuration?
“sh ip int br” (Show IP int brief)
What command is used to enter configuration mode?
“conf t” (Configure terminal)
How do you configure the interface IP address and subnet?
“<Config-if> int [interface name]"
"<Config-if> ip add xxx.xxx.xxx.xxx xxx.xxx.xxx.xxx"</Config-if></Config-if>
What command is used to save changes and activate the configuration?
“no shut” (No shutdown)
What does a copper cross-over cable allow?
It allows two PCs to talk to each other.
What is the purpose of a server in DHCP?
A server provides IP addresses to devices using DHCP (Dynamic Host Configuration Protocol).
At which layer does a switch operate?
A switch operates at Layer 2 as it uses Ethernet frames.
How does a switch learn MAC addresses?
A switch learns MAC addresses by using Hardware ASICs (Application-Specific Integrated Circuits).
What type of topology does a bridge learn MAC addresses on?
A bridge learns MAC addresses on a software level in a Hub Topology.
What is the main function of a router?
A router routes traffic from one IP network to another.
How does a firewall control traffic?
A firewall can permit or block traffic using firewall rules.
Where can a firewall be placed?
A firewall can be placed either outside a LAN or inside a LAN.
What does an IDS (Intrusion Detection System) do?
An IDS monitors network traffic for violations or suspicious activities.
What action does an IDS take when it detects violations?
An IDS will only alert or notify the system administrator but will not take direct action.
What is the function of an IPS (Intrusion Protection System)?
An IPS performs the functions of an IDS but also takes proactive measures to prevent detected violations or attacks.
What layer does a switch operate at in the TCP/IP model?
A switch operates at Layer 2 of the TCP/IP model as it uses Ethernet frames for forwarding traffic.
What is the purpose of a three-way handshake?
A three-way handshake establishes a connection between two network entities and enables parameter agreement and communication setup.
What are the steps involved in a three-way handshake?
SYN, SYN-ACK, ACK (Synchronize, Synchronize-Acknowledgment, Acknowledgment)
What do the hexadecimal values in a PDU indicate?
The hexadecimal values indicate which protocol stack to use.
What is the purpose of port numbers?
Port numbers indicate which service should handle the data and ensure it reaches the correct application or service running on the client or server.
What are the three ranges of port numbers?
Well-known Ports (0-1023), Registered/User Ports (1024-49151), Dynamic/Private/Ephemeral/Random Ports (49152-65535)
What service assigns IP addresses to devices?
DHCP (Dynamic Host Configuration Protocol) assigns IP addresses to devices.
