Network Questions | PrepOps.Dev

#1

In general, what do you need in order to communicate?

#2

What is TCP/IP?

#3

What is Ethernet?

#4

What is a MAC address? What is it used for?

#5

When is this MAC address used?: ff:ff:ff:ff:ff:ff

#6

What is an IP address?

#7

Explain the subnet mask and give an example

#8

What is a private IP address? In which scenarios/system designs, one should use it?

#9

What is a public IP address? In which scenarios/system designs, one should use it?

#10

Explain the OSI model. What layers there are? What each layer is responsible for?

#11

For each of the following determines to which OSI layer it belongs:

Error correction
- Packets routing
- Cables and electrical signals
- MAC address
- IP address
- Terminate connections
- 3 way handshake

#12

What delivery schemes are you familiar with?

#13

What is CSMA/CD? Is it used in modern ethernet networks?

#14

Describe the following network devices and the difference between them:

router
- switch
- hub

#15

What is a "Collision Domain"?

#16

What is a "Broadcast Domain"?

#17

three computers connected to a switch. How many collision domains are there? How many broadcast domains?

#18

How does a router work?

#19

What is NAT?

#20

What is a proxy? How does it work? What do we need it for?

#21

What is TCP? How does it work? What is the 3-way handshake?

#22

What is round-trip delay or round-trip time?

#23

How does an SSL handshake work?

#24

What is the difference between TCP and UDP?

#25

What TCP/IP protocols are you familiar with?

#26

Explain the "default gateway"

#27

What is ARP? How does it work?

#28

What is TTL? What does it help to prevent?

#29

What is DHCP? How does it work?

#30

Can you have two DHCP servers on the same network? How does it work?

#31

What is SSL tunneling? How does it work?

#32

What is a socket? Where can you see the list of sockets in your system?

#33

What is IPv6? Why should we consider using it if we have IPv4?

#34

What is VLAN?

#35

What is MTU?

#36

What happens if you send a packet that is bigger than the MTU?

#37

True or False? Ping is using UDP because it doesn't care about reliable connection

#38

What is SDN?

#39

What is ICMP? What is it used for?

#40

What is NAT? How does it work?

#41

Which port number is used in each of the following protocols?:

SSH
- SMTP
- HTTP
- DNS
- HTTPS
- FTP
- SFTP

#42

Which factors affect network performance?

#43

What is APIPA?

#44

What IP range does APIPA use?

#45

What does "control plane" refer to?

#46

What does "data plane" refer to?

#47

What does "management plane" refer to?

#48

To which plane (data, control, ...) does creating routing tables belong to?

#49

Explain Spanning Tree Protocol (STP).

#50

What is link aggregation? Why is it used?

#51

What is Asymmetric Routing? How to deal with it?

#52

What overlay (tunnel) protocols are you familiar with?

#53

What is GRE? How does it work?

#54

What is VXLAN? How does it work?

#55

What is SNAT?

#56

Explain OSPF.

#57

What is latency?

#58

What is bandwidth?

#59

What is throughput?

#60

When performing a search query, what is more important, latency or throughput? And how to ensure that we manage global infrastructure?

#61

When uploading a video, what is more important, latency or throughput? And how to assure that?

#62

What other considerations (except latency and throughput) are there when forwarding requests?

#63

Explain Spine & Leaf

#64

What is Network Congestion? What can cause it?

#65

What can you tell me about the UDP packet format? What about the TCP packet format? How is it different?

#66

What is the exponential backoff algorithm? Where is it used?

#67

Using Hamming code, what would be the code word for the following data word 100111010001101?

#68

Give examples of protocols found in the application layer

#69

Give examples of protocols found in the Network Layer

#70

What is HSTS?

#71

What is the Internet? Is it the same as the World Wide Web?

#72

What is the ISP?