module 4 protocols

Which IPsec encryption type encrypts the IP header?

ESP

You're working from home and need to access a file server at the office while working in an application from your work desktop. At the same time, you often stream music in your browser. Which VPN type will be most efficient while still meeting your needs?

split tunnel VPN

You need to determine which device on your network is sending excessive messages to your Ubuntu Server. Which utility will give you this information?

tcpdump

What is the Internet standard MTU?

1,500 bytes

What is the difference between dynamic ARP table entries and static ARP table entries?

Dynamic ARP table entries are created when a client makes an ARP request for information that could not be satisfied by data already in the ARP table. Static ARP table entries are those that someone has entered manually using the ARP utility.

Which protocol's header includes the source MAC address?

Ethernet

What protocol must be allowed through a firewall for tracert to work correctly?

ICMP (Internet Control Message Protocol)

An ARP table maps MAC addresses to what information?

IPv4 addresses

Which of these protocols does not include some kind of integrity check field in its header?

IPv6

Which encryption benchmark ensures data is not modified after it's transmitted and before it's received?

Integrity

Which remote file access protocol is an extension of SSH?

SFTP

You need to remote into a Linux server in another building on your network. Which of the following protocols should you use?

SSH (secure shell)

Which remote file access protocol uses port 22?

Secure File Transfer Protocol (SFTP)

You're getting a duplicate IP address error on your computer and need to figure out what other device on your network is using the IP address 192.168.1.56. What command will show you which MAC address is mapped to that IP address?

arp -a

At which OSI layer does IP operate?

Network Layer (Layer 3)

What is one advantage offered by VDI over RDS and VNC?

Offers access to multiple OSs in VMs

Which protocol's header would a layer 4 device read and process?

TCP

What three characteristics about TCP distinguish it from UDP?

TCP is connection-oriented; it uses sequencing and checksums; and it provides flow control

Which two components of the CIA triad are ensured by adequate encryption methods? Choose two.

confidentiality and integrity

Which two protocols manage neighbor discovery processes on IPv4 networks?

ICMP and ARP

Which encryption protocol does GRE use to increase the security of its transmissions?

IPsec

What field in a TCP segment is used to determine if an arriving data unit exactly matches the data unit sent by the source?

Checksum

What process is used to establish a TCP connection?

The three-way handshake process establishes a TCP connection. SYN (request for a connection); SYN/ACK (response to the request); ACK (connection established).