a. when you enhance one layer it doesn t affect the other layers
, r$ e$ p/ e6 u! l! Qb. design and development can be made in a modular fashion
$ E( S! c+ n% g% Zc. network operations can be simplified - C f0 {% L. E. S5 q
d. troubleshooting can be simplified. 4 b% s( e& o& c. R$ @
answer a b c d. ( [, w8 A7 c( b
14. which two of the following are not from the physical layer?
1 B# L$ s1 ^1 E: M8 W+ b9 c. pa. sdlc 6 ? u8 R' Q; m% D/ I
b. v.35 & @3 e4 E# P v9 v
c. hssi
+ S W5 X0 h) zd. isdn ! b$ o# `) Z4 i( p6 s, g* ~2 L; L& K
e. rs-232
3 e2 K& h' i5 v* Canswer a d. sdlc and isdn are wan protocols that function at the data link layer
% T K6 O+ w2 k1 ?: |15. which two answers are functions of the osi model"s network layer? - Y$ N( L7 H+ D' ^
a. sequencing of frames
% h3 \) {' A- h! d* P% G8 [% O e) lb. path determination 8 j" s& G) Q5 T6 a
c. packet switching
- a3 {/ Z* `( M1 Sd. packet sequencing " h' n1 O% U+ `
answer b c. sequencing is done at the data link layer. d is fictional.
, q: `+ e% [! r: T16. what is an example of a mac address? * U# d5 X* ]+ A- D; X8 x
a. az32:6362:2434
/ Q, \: n9 r2 R6 ]8 kb. sj:2817:8288 5 `1 m: L- ?7 G* [0 U; }# ~( W
c. ggg:354:665
) J! R) M% c5 ~) s Y m. x( H. ?d. a625:cbdf:6525
6 l0 M$ }9 C, y% @% Z+ q1 C; fanswer d. the address is a 48 bit address which requires 12 hex digits. a hex digit can t be past the letter f. hex stands for 16. 1-9 and a-f make up numbers that are valid. ( f- c/ q+ y4 H: N. r- j+ \( X( i% b! ]7 k
17. which of the following is not part of the data link layer? - D& _( ^1 G+ t _
a. transports data across the physical link * {' q) K- x! w3 O0 [/ x. t1 R1 _
b. performs physical addressing + C8 L" `% T0 D9 S* l
c. performs flow control / t p% A; F% K) X
d. determines network topology
) p0 O0 C& k+ ?1 ~, p7 ae. terminates a session - V$ [+ w8 i* M3 G9 g: ?5 ?9 R
answer e. this is part of the session layer
3 |. c2 M, l, j7 N: b+ P18. which of the following are data link protocols? ( F4 i0 ?1 u- P/ K
a. hdlc
3 F1 U% y; _7 H, l" h4 g! F5 [* sb. ftp + E0 U% B0 s7 O" u& ^( g2 @+ e
c. sql
8 o* }4 m ]; W% C4 E# fd. isdn
4 v2 ?5 G( @! Q* ~e. token ring
0 M7 U9 N# }9 j3 H8 ?. E' Zanswer a d e. ftp is an application and sql is a session layer protocol.
8 j2 e$ j c& C; N/ H5 E9 w19. of the following address aa77:3827:ef54, which of the following is the vendor portion? # S; x( o. _# |" i: l9 w
a. aa7738
' U% R/ X$ L* T+ {b. 27ef54 5 ?$ O8 c# \/ `5 i! ^! ]. F& d
c. aa77 * @; `! M& @# F* e7 Y# [
d. ef54 % V; M: n" _, X$ v8 h
answer a. the vendor code is how you can tell who made the card. the last 6 digits are the physical address. |