Computer networks worksheet with answers

Which protocol lets an email client read mail while keeping messages and folders on the server?

1. ASMTP
2. BDHCP
3. CSNMP
4. DIMAP

Which IPv4 address is the standard loopback address of a host?

1. A255.255.255.255
2. B192.168.0.1
3. C0.0.0.0
4. D127.0.0.1

Which IEEE standard family defines wired Ethernet?

1. AIEEE 802.3
2. BIEEE 802.5
3. CIEEE 802.11
4. DIEEE 802.16

Using even parity, which parity bit is added to the data bits 1011001?

1. A2
2. B1
3. C4
4. D0

Which metric does RIP use to choose routes?

1. ABusiness policy
2. BMeasured delay
3. CLink bandwidth
4. DHop count

What is the usual order of messages when a client obtains an address from DHCP?

1. ARequest, Offer, Discover, Acknowledge
2. BOffer, Discover, Acknowledge, Request
3. CDiscover, Request, Offer, Acknowledge
4. DDiscover, Offer, Request, Acknowledge

What does the Diffie-Hellman key exchange achieve on its own, and what is its weakness?

1. AIt signs certificates for websites, but only works with short keys
2. BIt encrypts bulk data directly over a public channel, but it is far too slow for large files and video
3. CIt agrees a shared secret over a public channel, but alone it is open to a man-in-the-middle
4. DIt authenticates both users with passwords, but needs a central server

Why was the TCP window scale option introduced?

1. AUDP needed a way to control its sending rate on congested paths
2. BWithout it, TCP could not detect lost segments on long-distance links
3. CThe 32-bit window field was too large and wasted header space in every TCP segment sent
4. DThe 16-bit window field limits the window to 65,535 bytes, too small for fast long-distance paths