We need to compute $(2171 + 48) \mod 5$.

First, let's add $2171$ and $48$:

$2171 + 48 = 2219$

Now, we compute $2219 \mod 5$. This is done by dividing $2219$ by $5$ and finding the remainder.

$2219 \div 5 = 443 \text{ remainder } 4$

So, $2219 \mod 5 = 4$.

Thus, $[2171 + 48] \mod 5 = 4$.

Would you like further explanation or any additional details?

Here are 5 related questions you might find helpful:

1. How is modular arithmetic used in computer science?
2. How can we simplify modular arithmetic problems?
3. What is the general form of a modular equation?
4. How would the result change if we used $\mod 3$ instead of $\mod 5$?
5. What is the significance of prime numbers in modular arithmetic?

Tip: In modular arithmetic, you can simplify large numbers before calculating by reducing each term mod $n$ first!