1. Network Fundamentals
The protocol used by email servers to exchange messages with one another.
What is SMTP?
The type of physical device that must be used between host devices for full duplex to function
What is a switch?
This TCP/IP utility is most often used to test whether an IP host is up and functional.
What is ping?
This type of firewall keeps track of the established connections passing through it.
What is a stateful firewall?
What is a packet sniffer?
SMTP, SNMP, FTP and HTTP all use this protocol to send traffic through the network.
What is TCP?
This physical topology has the most connections and is the least popular for LANs.
You need to log in to a Linux server across a network that is not secure. This protocol allows you to remotely administer this server in a secure way.
This tunneling protocol is based on RSA public-key encryption.
What is SSL?
The network center is getting calls from users arriving at work on Monday morning and finding that when they boot up their machine, they cannot connect to the Internet. Users who did not shut down their machine over the weekend are not having this problem. Where can the problem be?
What is the DHCP server?
This is the expected response for a SYN packet during the TCP Three-way Handshake process.
What is a SYN/ACK packet?
Your computer has been assigned an IP address of 192.255.254.0 which belongs to this class of IP addressing.
What is Class C?
What is MPLS?
This is the highest encryption that WPA2 can use.
What is AES-CCMP?
You receive a call from a user who is complaining that they cannot get on the Internet. You have them verify their IP address, mask, and default gateway. The IP address is 10.0.37.144, with a subnet mask of 255.255.254.0. The default gateway is 10.0.38.1. What is the problem?
Incorrect gateway IP
Acknowledgements, sequencing, and flow control are characteristics of this OSI Layer.
What is the Transport Layer (Layer 4)?
The network address of 172.16.0.0/19 provides how many subnets and hosts?
8 subnets and 8190 hosts
Provides a means for the receiver to govern the amount of data sent by the sender.
What is flow control?
This security feature on network switches provide a countermeasure against rogue DHCP servers.
What is DHCP snooping?
You are the network administrator. A user calls you, complaining that the performance of the intranet web server is sluggish. When you try to ping the server, it takes several seconds for the server to respond. You suspect that the problem is related to a router that is seriously overloaded. Which workstation utility could you use to find out which router is causing this problem?
What is tracert?
Which transmission type is used in streaming and can be sent specifically to multiple network nodes simultaneously?
What is Multicast?
This method allows us to join multiple physical switches into a single logical switching unit.
What is stacking?
This protocol helps us simplify the process of setting up a network and administering it.
What is SNMP?
An attacker managed to associate his/her MAC address with the IP address of the default gateway. In result, a targeted host is sending network traffic to the attacker's IP address instead of the IP address of the default gateway. Based on the given info, which type of attack is taking place in this scenario?
ARP poisoning / spoofing
Your network has suffered a catastrophic loss of connectivity. You cannot reach your routers, switches, and other network nodes. Which would you use to open a CLI on your local router?
What is Terminal console?