The
OSI reference model has seven layers:
Application
Presentation
Session
Transport
Network
Data Link
Physical
The
DoD model has four layers:
Process/Application
Host-to-Host
Internetwork
Network Access
1. Ethernet works at which layer in
the OSI/DoD models
a. Network/Internetwork
b. Network/Network Access
C. Data Link/Network Access
d. Physical/Network Access
2. What are the standard network masks
for
Class A Networks: 255.0.0.0
Class B Networks: 255.255.0.0
Class C Networks: 255.255.255.0
3. A T1 line operates at
a. 64 kbps
b. 128 kbps
c. 512 kbps
d. 1024 kbps
E. 1544 kbps
f. 6312 kbps
g. 44736 kbps
h. 274176
kbps
4. To connect two switches together you use which kind of
cable (choose all that apply)
a. Coaxial RG-58
b. Patch cable
C. Crossover cable
d. Single fiber-optic cable
E. A pair of fiber-optic cables (optional)
5. On a LAN the user data in a file transfer frame will be
encapsulated in the following headers
and trailers:
4. Data
1. Ethernet
5. Frame
Check Sequence (FCS)
2. IP
header
3. TCP
header
Including the data, place a number
a number between 1 and 5 after each item to indicate its order on the wire.
A schematic of a TCP/IP
packet enclosed in an Ethernet frame
|
Ethernet Header |
IP Header |
TCP Header |
User Data |
Frame Check Seq. |
6. What is the Ethernet broadcast
address? FF-FF-FF-FF-FF-FF
7. What function does the ARP protocol
serve:
a. Resolve
FQDNs from IP addresses
b. Resolve
IP addresses from MAC addresses
C. Resolve
MAC addresses from IP addresses
d. Resolve
IP addresses from FQDNs
8. How many bytes are used for a MAC
address? 6 bytes (48 bits). 3 bytes for vendor ID and 3 bytes for
user/NIC ID
9. What function does DNS perform in
the TCP/IP network
a. Resolve FQDNs from IP addresses
b. Resolve IP addresses from MAC addresses
c. Resolve
MAC addresses from IP addresses
D. Resolve
IP addresses from FQDNs
10. How many bytes are in an IP address
(v. 4)? 4 bytes/32 bits
11. What class is the address 192.218.65.21? Class C (192.0.0.0 – 223.255.255.0)
12. What class is the address
191.218.65.21? Class B (128.0.0.0
– 191.255.0.0)
13. LDAP uses the port 389 as a standard service port. If you wish to initiate a connection to an
LDAP server which port will your client insert this number into:
a. Source
port
B. Destination
port
14. When the server replies it will place 389 in which port:
A. Source
port
b. Destination
port
15. DHCP can manage which of the following (choose all that
apply):
A. IP
address
B. Router
addresses
C. Domain
names
D. WINS
servers
e. Printers
the client will use
f. All
f the above
DHCP can assign IP addresses to print servers but
it cannot manage the printers
16. Which protocol is used in dial-up internet accounts
a. PPOE
B. PPP
c. PPTP
d. SLIP
e. CSLIP
(Compressed SLIP)
17. What are the channels in an ISDN BRI (Basic Rate
Interface)? 2B (bearer) + 1D
(delta)
18. What are their transmission speeds? B = 64 kbps/D = 16 kbps
19. Asymmetric encryption is characterized as
a. Secure
and fast
B. Secure
and slow
c. Using
a shared secret key
D. Using
a public key and a private key
E. The
method of establishing an SSL connection
20. A Proxy Server will perform Network Address Translation
A. True b. False
21. A hash function reversibly converts the contents of file
or data string into a number:
a. True B. False
A hash function is irreversible
22. Microsoft user level security uses a centralized database
of account names and passwords
A. True b. False
23. A VPN connection across the Internet tunnel must be
terminated by Public Internet Addresses
A. True b. False
Every Internet connection must terminate in a
Public Internet Address
24. RFC 1918 defines sets of private IP addresses. They are (choose all that apply):
a. 10.0.0.0/255.255.0.0
B. 10.0.0.0/255.0.0.0
c. 172.16.0.0/255.255.0.0
D. 172.16.0.0/255.240.0.0
E. 192.169.0.0/255.255.0.0
f. 192.169.0.0/255.255.255.0
25. Microsoft has registered the APIPA address range. What must an Internet router do if it
encounters an address in the APIPA or RFC 1918 range? Discard it
26. The address mask determines whether two hosts will appear
on the same network. Are the following
two machines on the same network:
a. 172.18.16.32/255.255.255.0
b. 172.18.17.33/255.255.255.0 No, they are on
172.18.16.0 and 172.18.17.0, respectively
27. How do hosts on different networks communicate? Routers
28. What does Ping 10.24.13.14 test? Basic TCP/IP network connectivity
29. What does Ping Tech09 test? TCP/IP network connectivity using name resolution (DNS or
WINS)
30. The output of TRACERT shows: 109.23.44.15 id.nobody.com
10 MS 10 MS 11 MS.
What does it signify?
It shows that traffic to a host passed through
a router (hop) in the domain id.nobody.com with a time to reach it of about 10
milliseconds. Generally it shows a hop
on the way to the target, which is the minimum answer required.