Computer networks worksheet with answers

In which network topology is every device connected to one central switch or hub?

1. ARing
2. BBus
3. CFull mesh
4. DStar

What is encapsulation in layered networking?

1. AEncrypting all data before sending it
2. BEach layer adds its own header to the data from the layer above
3. CCompressing packets to save bandwidth
4. DEach layer removes the header added by the layer above before sending

Which transport protocol provides reliable, ordered delivery with acknowledgements?

1. AUDP
2. BIP
3. CTCP
4. DICMP

What does a subnet mask of 255.255.255.0 correspond to in CIDR notation?

1. A/16
2. B/32
3. C/8
4. D/24

Why does a switch sometimes send a frame out of all ports except the one it came in on?

1. AThe frame is too large for one port
2. BThe frame has a wrong IP checksum and must be checked by every host
3. CThe destination MAC address is not yet in its address table
4. DThe switch is acting as a router

TLS provides which security properties for HTTPS?

1. AProtection against all malware and phishing on the visited site
2. BAnonymity of the user
3. COnly faster loading
4. DConfidentiality, integrity and server authentication

A TCP connection has a 64 KB window and a 100 ms round-trip time, and no window scaling. What is its approximate maximum throughput?

1. AAbout 640 Mbit/s
2. BAbout 50 Mbit/s
3. CAbout 5 Mbit/s
4. DAbout 0.5 Mbit/s

You must divide 192.168.1.0/24 into at least 5 subnets with up to 25 hosts each. Which prefix length fits best?

1. A/26
2. B/28
3. C/27
4. D/25