IGCSE Computer Science Paper 1 Crossword: 2.1 Data Transmission Types and Methods (Modules 121–130)
Name:
Date:
Class:
✎
Crossword
Read each clue and write the matching term in the grid. Numbers in brackets show the letters in each word.
1
2
3
4
5
6
7
8
9
Across
- 3. Word 1 of the term in 1 Down: ______ _________ _____ (6)
- 5. Word 3 of the term in 1 Down: ______ _________ _____ (5)
- 8. After the last packet arrives, the receiving device uses the packet numbers in the headers to put the packets in the right order and joins the payloads to rebuild the message. Word 1 of: __________ _______ (10)
- 9. Bits sent together down parallel wires arrive at slightly different times, so data can be received incorrectly. It gets worse as the cable gets longer. (4)
Down
- 1. Data is split into numbered packets, routers pick each ______'s route, packets may arrive out of order, then they are reordered to rebuild the data once the last ______ arrives. Word 2 of: ______ _________ _____ (9)
- 2. ______ take different routes, so they may reach the destination in a different ______ from the one sent, e.g. packet 5 before packet 4. ______ is not guaranteed. Word 3 of: _______ ______ ___ of _____ (3)
- 4. Word 2 of the term in 2 Down: _______ ______ ___ of _____ (6)
- 5. Sending data one bit at a time, one after another, down a single wire or channel. The bits arrive in the same order they were sent. Word 1 of: ______ transmission (6)
- 6. Word 1 of the term in 2 Down: _______ ______ ___ of _____ (7)
- 7. Word 5 of the term in 2 Down: _______ ______ ___ of _____ (5)
Answer Key
IGCSE Computer Science Paper 1 · Modules 121–130
1S
W
2O
I
U
3P
4A
C
K
E
T
5S
T
E
6P
S
R
C
E
A
R
H
R
C
I
I
I
K
7O
V
N
A
8R
E
O
R
D
E
R
I
N
G
L
T
D
9S
K
E
W
R
Across
3PACKET — Word 1 of the term in 1 Down: ______ _________ _____
5STEPS — Word 3 of the term in 1 Down: ______ _________ _____
8REORDERING — After the last packet arrives, the receiving device uses the packet numbers in the headers to put the packets in the right order and joins the payloads to rebuild the message. Word 1 of: __________ _______
9SKEW — Bits sent together down parallel wires arrive at slightly different times, so data can be received incorrectly. It gets worse as the cable gets longer.
Down
1SWITCHING — Data is split into numbered packets, routers pick each ______'s route, packets may arrive out of order, then they are reordered to rebuild the data once the last ______ arrives. Word 2 of: ______ _________ _____
2OUT — ______ take different routes, so they may reach the destination in a different ______ from the one sent, e.g. packet 5 before packet 4. ______ is not guaranteed. Word 3 of: _______ ______ ___ of _____
4ARRIVE — Word 2 of the term in 2 Down: _______ ______ ___ of _____
5SERIAL — Sending data one bit at a time, one after another, down a single wire or channel. The bits arrive in the same order they were sent. Word 1 of: ______ transmission
6PACKETS — Word 1 of the term in 2 Down: _______ ______ ___ of _____
7ORDER — Word 5 of the term in 2 Down: _______ ______ ___ of _____